Characterization of Minerals, Metals and Materials 2022: Characterization of Mechanical Properties
Sponsored by: TMS Extraction and Processing Division, TMS: Materials Characterization Committee
Program Organizers: Mingming Zhang, Baowu Ouyeel Co. Ltd; Jian Li, CanmetMATERIALS; Bowen Li, Michigan Technological University; Sergio Monteiro, Instituto Militar de Engenharia; Shadia Ikhmayies; Yunus Kalay, Middle East Technical University; Jiann-Yang Hwang, Michigan Technological University; Juan Escobedo-Diaz, University of New South Wales; John Carpenter, Los Alamos National Laboratory; Andrew Brown, Devcom Arl Army Research Office; Rajiv Soman, Eurofins EAG Materials Science LLC; Zhiwei Peng, Central South University

Tuesday 8:00 AM
March 1, 2022
Room: 207B
Location: Anaheim Convention Center

Session Chair: Kelvin Xie, Texas A&M University; Veeraraghavan Sundar, Ues Inc.


8:00 AM Introductory Comments

8:05 AM  
Harnessing Thermomechanical Treatment to Explore Processing-structure-property Relationships in ARB Cu/Nb: Justin Cheng1; Madhavan Radhakrishnan2; Cody Miller3; Ryan Mier3; Carl Osborn3; Sven Vogel3; John Carpenter3; Osman Anderoglu2; Nathan Mara1; 1University of Minnesota Twin Cities; 2University of New Mexico; 3Los Alamos National Laboratory
    ARB Cu/Nb nanolaminates have been studied extensively to link bulk processing parameters to changes in interface structure, microstructure, and extreme condition performance in layered heterophase composites. Nanoscale ARB Cu/Nb contains a high density of heterophase interfaces that mediate dislocation activity to make the composite many times stronger than its constituent phases. Past work on this topic has linked certain processing pathways to preferred crystallographic textures and associated interfacial character; annealing can sharpen existing textures in ARB composites, and changes in rolling direction can access transient textures. We present texture data measured via neutron diffraction from samples that have been annealed and subsequently subjected to different strain pathways to assess the degree to which we can sharpen and evolve textures in ARB composites. We then relate these processing-induced textures to mechanical behavior obtained from miniaturized tensile tests.

8:25 AM  
Review on Hybrid Severe Plastic Deformation of ZV44 Magnesium Alloy: Microstructure, Property, and Application: Raviraj Verma1; Gaurav Singh1; Rakesh Ch.1; Jayaganthan R.1; 1Engineering Design Department, Indian Institute of Technology Madras, INDIA
    Magnesium alloys are rapidly emerging as the lightest structural material, potentially used in electronics, automobile, aerospace, and biomedical applications. The Mg-4Zn-4Gd (ZV44) alloy has been processed through hybrid severe plastic deformation techniques, which has shown impressive improvements in tensile (180%), hardness (135%), fatigue (85%), and fracture properties (70%) compared to the solution treated specimen. Such improvements were due to the hybridization of more than one plastic deformation technique, unlike single SPD techniques such as rolling or ECAP. The optimization of repetitive-hot-rolling and uniaxial-forging has modified and produced bimodal microstructure resulting in good strength and ductility. The processing- microstructure-property correlation was done exhaustively with the help of HR/S-TEM, FE-SEM/EDS, and XRD. The reasons for characteristic enhancements are grain refinement, dislocation density, strain hardening, fragmentation and distribution of precipitate, etc.

8:45 AM  
Development of a New Small Punch Test System for Shear and Bending Tests: Tal Yehuda1; Matan Tubul1; Ziv Ungarish1; Shay Amar1; 1Negev Nuclear Research Center
    The SPT (small punch test) is a method for obtaining the yield strength and the ultimate tensile strength of a certain material. The uniqueness of this method is the use of a miniature specimen, enabling to produce a relatively large amount of data from a small amount of material available for testing. The SPT is popular in the nuclear field. Using a miniature specimen of an Irradiated material facilitates the task by reducing radiation. In this paper, the design process of a new SPT system, which perform both shear and bending tests on miniature samples is described. The different design considerations in the developing process are presented. The process of examining the different mechanisms and deciding on the most suitable one, taking into account different engineering considerations is detailed in the paper. Last, a few examples of force/displacement curves, which were measured using the new SPT system design are presented.

9:05 AM  
Automated Laue Pattern Analysis for Multi-peak Strain Imaging of Nanocrystals at 34-ID-C: Yueheng Zhang1; Anthony Rollett1; Robert Suter1; 1Carnegie Mellon University
    The 34-ID-C beamline of the Advanced Photon Source has recently acquired the capability to conduct Laue diffraction for indexing arbitrarily oriented crystals, thus, facilitating the collection of coherent diffraction imaging data from multiple Bragg reflections and reconstructing the six-component Eulerian strain tensor inside the volume of a nanocrystal. A polychromatic x-ray beam illuminates a nanocrystal causing multiple reflections to simultaneously fulfill the Bragg condition and casting a unique Laue pattern. When many grains are simultaneously illuminated, multiple Laue patterns appear on the detector, complicating the process of identifying the corresponding set of peaks and indexing. Here, we established workflows that will be available to every beamline user for automating the analysis of overlapping Laue patterns and building an orientation map of the microstructure. Such tools will provide reliable indexing of grains of polycrystalline materials and allow us to intelligently conduct coherent x-ray diffraction experiments on embedded grains.

9:25 AM Break

9:45 AM  
Effect of Equal Channel Angular Pressing and Targeted Heat Treatment on Aluminum AA7075 Sheet Metal: Maximilian Gruber1; Thomas Spoerer1; Christian Illgen2; Philipp Frint2; Martin Wagner2; Philipp Lechner3; Wolfram Volk1; 1Technical University of Munich; 2Technical University of Chemnitz; 3Chair of Metal Forming and Casting, Technical University of Munich
     In this study, ECAP was used to improve the mechanical properties of AA7075 sheet metal. Different approaches, such as channel geometry, forming temperature and post-treatment time, were tested for the ECAP-route C. The specimens were evaluated by tensile testing and compared to reference specimens in the artificially aged T6 condition. The goal was to optimize the time- and energy-consuming artificial ageing procedure. The results show that a 75 % reduction in artificial aging time still resulted in an 11 % increase in yield strength due to ECAP. In addition the elongation at fracture is strongly influenced by ECAP. Therefore, tensile tests on a conductive heated test bench were performed to point out the potential for hot forming processes.From the results of the tests, it is shown that ECAP for sheet metal enables an efficient production of high strength aluminum and thus makes a contribution to a more sustainable production.