Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies: Poster Session
Sponsored by: TMS Materials Processing and Manufacturing Division, TMS: Shaping and Forming Committee
Program Organizers: Arun Devaraj, Pacific Northwest National Laboratory; Pascal Bellon, University of Illinois at Urbana-Champaign; Suhas Eswarappa Prameela, Massachusetts Institute of Technology (MIT); Mostafa Hassani, Cornell University
Tuesday 5:30 PM
March 21, 2023
Room: Exhibit Hall G
Location: SDCC
Hybrid Rate Theory Model: Alternative Approach for Analysis of Radiation-induced Growth: Mahdi Mohsini1; Peyman Saidi1; Mark Daymond1; 1Queen's University
Diffusivity difference of radiation products in prismatic and basal planes of Zirconium unit cell results in phenomena such as irradiation-induced growth and creep. Diffusional Anisotropy Difference (DAD), which suggests dissimilar rates of diffusion for individual vacancies and interstitials in basal and prismatic planes. An alternative mechanism, Self-Interstitial Cluster Diffusion (SICD), relates the growth to the formation of self-interstitial clusters which diffuse solely along the <a> direction. Due to limitations of both models, we propose a model, in which limitations have been solved. In this model, the combination of point defects and SIA clusters exist and diffuse to the sinks in the bulk and dislocation loops in the prism planes, respectively. Furthermore, the bias factor is considered for the cases of annealed polycrystals and cold worked polycrystals to expand the generalizability of the model. Consequently, the sinks of grain boundaries and the enhanced dislocation density due to cold work were captured.
Microstructure Evolution for Modulate Color of Alloy: Study about Cu-Al-Zn-Sn Alloy: Gyeol Chan Kang1; Hae Jin Park1; Seogyeon Namgung1; Ahjin Shim1; Hyo Soo Lee2; Jin Kyu Lee3; Taek Jib Choi1; Ki Buem Kim1; 1Sejong University; 2Korea Institute of Industrial Technology; 3Kongju National University
Recently, coloration methods for metallic material had been developed by various theory-based research. One of them, surface treatment methods were using popularly and optimized to various metallic material. However, it has the critical disadvantage, which is easily destructed the colored layer due to external damage and chemical reactions. Therefore, we have developed the color alloys by selecting the intermetallic compound or solid solution, which has its own color to resolve its disadvantages. In case of solid-solution alloy, it reveals own unique color, because of optical transition energy of alloy has visible light range. it can be modulated by compositional design of alloy. However, there is limitation in alloy design and therefore coloration of alloy is limited.In this study, we controlled optical properties without compositional design. The solid-solution alloy was conducted cold rolling and annealing process for microstructure evolution. And then, we considered about relationship between optical properties and microstructure.