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Preliminary Exam Seminar Wednesday, December 1, 8 AM
by Morgan, Yuan-Yu Karen 17 Nov '21

17 Nov '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR “Radiative Properties of Ultra-High Temperature Ceramics: ZrB2-SiC” By Abdullah Saad Purdue MSE Preliminary Exam Advisor: Professor Rodney Trice and Professor Carlos Martinez ABSTRACT Developing vehicles that can fly at a speed more than Mach 5 is essential for next-generation hypersonic aircraft. During hypersonic flight, a significant amount of energy is transferred to the vehicle leading edge, heating it to a temperature greater than 1800℃. It is necessary to reduce this high surface temperature of leading edges and this reduction in temperature can be achieved by radiating heat away from the surface. The relevant material property is emissivity, with a value approaching one desired. To protect the leading edge of hypersonic vehicle from extreme heating, it is important to find a class of materials that can withstand high temperatures and have enhanced radiative property. Ceramics are suitable for high-temperature applications since they usually melt at higher temperatures than metals and alloys. The potential class of materials to be used in extreme hypersonic environments is known as ultra-high temperature ceramics (UHTC). Usually, borides and carbides of transition materials are considered UHTC because of their high melting points, oxidation, and ablation resistance. Among them, ZrB2 has been investigated as a promising UHTC material for the hypersonic application. However, ZrB2 alone is not an ideal candidate because of its low fracture toughness and low oxidation resistance at high temperatures over 1400℃. To overcome such shortcomings, SiC is incorporated into ZrB2, improving the densification of ZrB2 and its oxidation resistance. More importantly, several studies have been performed to investigate the radiative properties of ZrB2-SiC composites and to discover methods to tailor the emissivity of this potential candidate. Ultimately, the outcome of these investigations is to find a material system which will be capable of radiating energy at high temperatures with maximum efficiency and will have improved ablation properties, and oxidation resistance. Date: Wednesday, December 1, 2021 Time: 8:00 AM WebEx: https://purdue.webex.com/meet/rtrice Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan(a)purdue.edu<mailto:ymorgan@purdue.edu>

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Preliminary Exam Seminar, December 1, Wednesday at 9 AM
by Morgan, Yuan-Yu Karen 17 Nov '21

17 Nov '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Gamma-irradiation Resistant and Inkjet Printable Potentiometric pH sensors and Their Reference Electrodes" By Bingyuan Zhao Purdue MSE Preliminary Exam Advisor: Professor Alexander Wei and Professor Lia Stanciu ABSTRACT Flexible electrochemical sensors have emerged as a new generation of sensors to substitute for traditional sensors, due to their low-cost, ease of fabrication, and biocompatibility. However, given the huge application potential of SC-ISEs in biomedical processes and clinical analysis applications, few work discussed the sterilization compatibility of these flexible sensors, which is of great significance before launching to the market. In addition, to make them low-cost and easy-to-scale-up, a easier way instead of conventional lithography techniques needs to address. The lack of these two studies motivates us to develop new SC-ISEs and their reference electrodes that can maintain their ffunctionalities after sterilization process; and use inkjet printing to produce the electrodes which is applicable for large scale manufacturing processes. Date: December 1, 2021 Time: 9:00 AM Place: Webex--https://purdue.webex.com/meet/alexwei Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan(a)purdue.edu<mailto:ymorgan@purdue.edu>

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Final Exam Seminar, Tuesday, November 30, at 11:30 AM
by Morgan, Yuan-Yu Karen 16 Nov '21

16 Nov '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "The Influence of Print Layer Orientation on the Mechanical Properties of SiC and Cf/SiC CMCs Formed via Direct Ink Writing" By Kyle Cox Purdue MSE M.S. Final Exam Advisors: Professor Rodney Trice and Professor Jeff Youngblood ABSTRACT Silicon carbide is a useful monolithic and matrix ceramic due to its excellent mechanical properties and corrosion/oxidation resistance at high temperature. This makes it an attractive material for use in advanced applications, such as aircraft engines and high-speed flight. In this study, additively manufactured monolithic SiC and Cf/SiC CMCs, processed via direct ink writing (DIW) of a 53 vol% colloidal suspension, achieved >96% theoretical density through pressureless sintering. When present, fibers are aligned in the direction of the print path. Five different print paths were studied, including a 0o path, 90o path, 0/90o path, 0/15/30/45/60/75/90o path, and 0/30/60/90/60/30/0o path. Four-point bend testing was performed to determine flexural strength and Weibull analysis was performed. Strengths were highest for the 0o print path. The characteristic strength, σo, of this print path was 375 MPa with a Weibull modulus of 7.4 for monolithic SiC and a σo of 361 MPa with a Weibull modulus of 10.7 for Cf/SiC. Weibull modulus was greater for Cf/SiC samples compared to identically printed monolithic SiC samples. SEM and optical microscopy were used to analyze printed parts which showed a high degree of fiber alignment in the direction of the print. Fiber pullout was observed on the fracture surface, as well as intragranular fracture. Date: Tuesday, November 30, 2021 Time: 11:30 A.M. Place: by Webex https://purdue.webex.com/meet/rtrice Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan(a)purdue.edu<mailto:ymorgan@purdue.edu>

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Final Exam Seminar, Monday, November 29, 10 AM
by Morgan, Yuan-Yu Karen 15 Nov '21

15 Nov '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Impact of Dynamic Ageing on The Formation and Stability of Model Bilge Water Oil-in-Water Emulsions" By Rina Sabatello Purdue MSE M.S. Final Exam Advisors: Professor Carlos Martinez and Professor John Howarter ABSTRACT Ships, including those in the US Navy, collect oily wastewater in their bilge due to onboard cleaning and mechanical operations. Oil-in-water emulsions (O/W) are present in bilgewater, and their filtration is difficult due to surfactants provided by cleaning products. Despite cleaning efforts, over 457,000 tons of oil are discharged into the ocean every year. An often overlooked aspect of bilgewater emulsions is their evolution, as the ship's movement at sea provides extra energy that can further emulsify the collected oil. This work aims to understand the effects of motion on model bilgewater emulsions by tracking their evolution in dynamic (rocking motion) and static conditions. The model bilgewater emulsion comprises mineral oil, deionized water with 0.42 M NaCl to mimic the salinity of seawater and sodium lauryl ether sulfate and Triton X-100, as commonly found anionic and nonionic surfactants, respectively. A rocker is used to simulate a ship motion; 15 mL of emulsion were placed in 50 mL centrifuge tubes to mimic partially filled bilgewater tanks. Emulsions were characterized via laser diffraction and optical microscopy. Model bilgewater emulsions with either SLES or Triton X-100 at concentrations above 100 ppm and 500 ppm, respectively, show long-term stability in static (no-rocking) conditions up to 20 days of observation. These concentrations represent the minimum surfactant concentration needed to obtain stable emulsions under static conditions. Under dynamic conditions, the minimum surfactant concentration to obtain stable emulsions increases to 500 ppm and 1000 ppm for SLES and Triton X-100, respectively. These results mean that the ship motion can induce drop coalescence in unstable emulsions with lower surfactant concentrations. However, the drop size distributions for stable emulsions under dynamic conditions show further emulsification as the average drop size decreases. The ship motion can help further reduce the size of the emulsion drops to diameters < 2.8 µm, which are significantly harder to filter out using current methods. A bilgewater tank partially filled will likely show a higher amount of sloshing than a filled one. To understand the effects of bilgewater storage volume on emulsification, a series of dynamic experiments were carried out with samples that contained up to 100% of the centrifuge tube volume occupied by the model bilge water emulsion. Even when 100% of the centrifuge volume is occupied and sloshing is eliminated, the oil moves due to density differences, and the shear stress between fluids can induce the generation of drops < 2.8 µm. In summary, this work shows that the ship motion provides enough energy for emulsification once a minimum surfactant concentration is reached regardless of the volume of emulsion stored in the tanks. The data suggests that the best way to mitigate stable bilgewater emulsion formation is by reducing surfactant concentration Date: Monday, Nov 29, 2021 Time: 10:00 A.M. Place:https://purdueedu.zoom.us/j/97465163370?pwd=cW1JdFBCdE9maTRmN3ZJMUZHWmxsQT09 Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan(a)purdue.edu<mailto:ymorgan@purdue.edu>

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MSE 690 Nov 15 Karen Winey, ARMS 1010, 3:30 PM
by Ku Blanco, Aury Y 12 Nov '21

12 Nov '21

Good afternoon, See you at 3:30 in ARMS 1010 this coming Monday for Prof. Karen Winey's visit to campus. [cid:image003.jpg@01D7D7D6.10274060] Best, Aury Ku she/her/hers Administrative Assistant Materials Engineering Neil Armstrong Hall of Engineering 701 W Stadium Ave, ARMS 2300 West Lafayette, IN 47906 o: 765-494-4100 f: 765-494-1204

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FW: Chemistry Analytical Seminar, Tuesday, November 16, 2021
by Son, Rosemary E 12 Nov '21

12 Nov '21

From: Hanna, Thomas J Sent: Friday, November 12, 2021 2:34 PM To: Mechanical Engineering Graduate Office <megradoffice(a)purdue.edu>; Elwell, Cathy L <celwell(a)purdue.edu>; Golden, Matt <goldenm(a)purdue.edu>; Ricksy, Jennifer R <jricksy(a)purdue.edu>; Zimmerman, Nicole K <nzimmerm(a)purdue.edu>; Son, Rosemary E <son39(a)purdue.edu>; Johnson, Beverly J <bevjohnson(a)purdue.edu>; Delaney, Morgan J <mdelane(a)purdue.edu> Subject: Chemistry Analytical Seminar, Tuesday, November 16, 2021 Please distribute the attached Analytical Seminar announcements for the seminar on Tuesday, Nov 16, 2021 in your respective areas. Thank you, Tom Hanna Administrative Assistant to: Analytical Division of Chemistry Professors Claridge, Kenttämaa, A. Laskin, J. Laskin, McLuckey, Simpson, Wirth, C. Zhang Organic Division of Chemistry Professors Axelrod, Chmielewski, Lipton, Mao, Mei, Sintim Department of Chemistry BRWN 5171A Purdue University 560 Oval Drive West Lafayette, IN 47907-2084 hanna9(a)purdue.edu<mailto:hanna9@purdue.edu> 765-494-5267

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FW: nanoHUB Hands-on Machine Learning Workshop
by Stacey, Lisa A 12 Nov '21

12 Nov '21

Forwarding on behalf of Prof. Arun Kumar Mannodi Kanakkithodi: Lisa Stacey Administrative Assistant to the Department Head School of Materials Engineering Neil Armstrong Hall of Engineering o: 765-494-4095 f: 765-494-1204 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…> ________________________________ nanoHUB is excited to announce that a new workshop has been scheduled in the Fall 2021 session of our Hands-on Data Science and Machine Learning Training Series. Series information: Our series is aimed at active researchers and educators and designed to introduce practical skills with online, hands-on activities that participants will be able to incorporate in their own work. Hands-on activities will use nanoHUB cloud computing resources, negating the need to download or install any software. All that is required of the audience is an internet connection and an hour to spare for the demonstration. After the training sessions, you will be able to continue using nanoHUB for research or education. Recordings and associated materials from prior workshops can be found at the workshop webpage: https://nanohub.org/groups/ml/handsontraining<https://click.mail.nanohub.org/?qs=fa5d19fdba110be3328ac7c0e6aa1c23ed02fcba…> Register soon as seats are limited. Date/Time: Wednesday, November 17, 2021 / 1:00 PM - 2:00 PM EST Title: Integrating Machine Learning with a Genetic Algorithm for Materials Exploration Presenter: Joe D. Kern, Georgia Institute of Technology, Ramprasad Group Register for this workshop here<https://click.mail.nanohub.org/?qs=fa5d19fdba110be31df082c3e47a7f7022739f4c…> Abstract: The genetic algorithm is a computer algorithm inspired by nature: selecting parents of a generation via some fitness function, crossing-over the parent genes (reproduction), and randomly mutating the genes of the children. In this talk, we will explore how this algorithm can be used for materials discovery by: 1. Generating swift material property prediction using machine learning (ML) 2. Creating an algorithm to design new materials from combinations of prior ones 3. Integrating the ML property predictors with the design algorithm to discover new materials PolyGA, an implementation of the genetic algorithm for the polymer domain, will be used as the basis for this exploration. Bio: Joe D Kern is a Materials Science and Engineering graduate student at the Georgia Institute of Technology in the Ramprasad Group. Prior to graduate school, he dual majored in Materials Science and Computer Science at the University of Wisconsin - Madison and spent six years in the Minnesota National Guard as an Arabic Linguist. His research involves utilizing computational techniques, such as genetic algorithms and machine learning, to expedite materials discovery in the polymer chemical space. Regards, Alejandro Strachan Deputy Director, nanoHUB Arun Mannodi Kanakkithodi (he/him/his) Assistant Professor, School of Materials Engineering, Purdue University https://www.mannodigroup.com/

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FW: Special Analytical Seminar, Monday, November 15, 2021
by Son, Rosemary E 12 Nov '21

12 Nov '21

From: Hanna, Thomas J Sent: Friday, November 12, 2021 9:41 AM To: Mechanical Engineering Graduate Office <megradoffice(a)purdue.edu>; Elwell, Cathy L <celwell(a)purdue.edu>; Golden, Matt <goldenm(a)purdue.edu>; Ricksy, Jennifer R <jricksy(a)purdue.edu>; Zimmerman, Nicole K <nzimmerm(a)purdue.edu>; Son, Rosemary E <son39(a)purdue.edu>; Johnson, Beverly J <bevjohnson(a)purdue.edu>; Delaney, Morgan J <mdelane(a)purdue.edu> Subject: Special Analytical Seminar, Monday, November 15, 2021 Please distribute to your respective areas the attached announcement notice for the Special Analytical Seminar on MONDAY, November 15, 2021. Where: BRWN 4102 When: Monday, November 15, 2021 Time: 9:30-10:30am Special Guest Speaker: Bryon Drown Bioanalytical Chemistry, NCI NRSA Fellow Northwestern University Title: "Chemical and Analytical Approaches for Understanding and Combating Human Disease" See attached Abstract. Thank you, Tom Hanna Administrative Assistant to: Analytical Division of Chemistry Professors Claridge, Kenttämaa, A. Laskin, J. Laskin, McLuckey, Simpson, Wirth, C. Zhang Organic Division of Chemistry Professors Axelrod, Chmielewski, Lipton, Mao, Mei, Sintim Department of Chemistry BRWN 5171A Purdue University 560 Oval Drive West Lafayette, IN 47907-2084 hanna9(a)purdue.edu<mailto:hanna9@purdue.edu> 765-494-5267

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KR Sridhar, EEE Virtual Seminar Nov. 18, 4 PM
by Stacey, Lisa A 10 Nov '21

10 Nov '21

Forwarding on behalf of Environmental and Ecological Engineering, please consider attending... Lisa Stacey Administrative Assistant to the Department Head School of Materials Engineering Neil Armstrong Hall of Engineering o: 765-494-4095 f: 765-494-1204 [3749DD84]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.purdue.edu_-3Futm-…> ________________________________ [cid:image005.jpg@01D7D63A.B37908E0] Nina L Robinson, PhD Administrative Director, Environmental and Ecological Engineering Potter Engineering Center, 500 Central Drive, West Lafayette, IN 47907 o: 765-496-7578 f: 765-494-4482 [cid:image001.png@01D7D62C.C7A03770]<https://www.purdue.edu/?utm_source=signature&utm_medium=email&utm_campaign=…>

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Final Exam Seminar Friday, December 3, 2021, 3:30 PM at ARMS 1103
by Morgan, Yuan-Yu Karen 10 Nov '21

10 Nov '21

Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "EXPLORING THE TUNABILITY OF MARTENSITIC TRANSFORMATION IN SHAPE MEMORY ALLOYS VIA COHERENT SECOND PHASE" By Shivam Tripathi Purdue MSE Ph.D. Final Exam Advisors: Professor Alejandro Strachan and Professor Michael Titus ABSTRACT Shape memory alloys (SMAs) belong to an important class of active materials. Beyond shape memory, these alloys exhibit super-elasticity and pseudo-plasticity, all originating from a reversible phase transformation from a high-temperature austenitic phase to a low temperature martensitic phase. Their unique thermo-mechanical properties make these SMAS desirable for a wide range of applications in automobiles, robotics, aerospace, construction, and medicine. Only a fraction of the known metallic alloys exhibits martensitic transformations, and a relatively small subset exhibits shape memory. Given this limited pool of SMAs, tunability of this martensitic transformation and, hence, thermo-mechanical properties is a way to move forward for effectively designing the next-generation SMAs for specific applications. The modification in composition has always been at the heart of designing new SMAs for future applications. However, a relatively recent discovery of incorporating a second non-transforming phase in base martensitic materials to tune martensitic transformation to achieve unprecedented thermo-mechanical properties has shown great promise. The objective of this work is to utilize the second phase to provide design guidelines for next-generation SMAs and to understand the detailed physics behind the experimentally observed unprecedented thermo-mechanical properties in SMAs as a result of the incorporation of coherent second phases. We first investigate Mg-Sc shape memory alloys that are attractive for a wide range of applications due to their low density. Unfortunately, the use of these alloys is hindered by a low martensitic transformation temperature (173 K). We observe from first-principles calculations that epitaxial strains arising from appropriate substrate or coherent second phase selection increase the martensitic transformation and operational temperature to room temperature. Next, we develop a novel approach to induce martensitic transformation in composite systems of two non-transforming materials. While we demonstrate this approach for the technologically relevant ultra-lightweight Mg/MgLi superlattices, however, our approach is general and will open a wide material space for the discovery and design of next-generation SMAs. Finally, to bridge the gap between computationally studied single-crystalline materials and experimentally studied polycrystalline systems, we characterize the role of nanoscale precipitates on temperature- and stress-induced martensitic phase transformation in nanocrystalline Ni63Al37 SMAs using multi-million-atoms molecular dynamics simulations. Simulations provide the understanding of underlying atomistic mechanisms of experimentally observed unprecedented thermo-mechanical properties and the guidelines to design low-fatigue ultra-fine grain shape memory alloys. As a result of the exploration of novel thermomechanical properties in SMAs via coherent second phases, we also published a software package to discover coherent precipitates within a base multi-component system by coupling high-throughput equilibrium thermodynamics calculations with strain-based lattice matching. Date: Friday, December 3, 2021 Time: 3:30 P.M. Place: ARMS 1103 Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan(a)purdue.edu<mailto:ymorgan@purdue.edu>

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