Materials Reports  2021, Vol. 35 Issue (Z1): 378-380 |
| METALS AND METAL MATRIX COMPOSITES |
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| Study on Texture and Microstructure of Co During Phase Transformation |
| WANG Shuming1, ZHANG Hua2, ZUO Yuting1, CAO Ruijun3
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1 Guobiao (Beijing) Testing & Certification Co., Ltd, Beijing 100088, China
2 China Nonferrous Metals Industry Associaton Recycling Metal Branch, Beijing 100037, China
3 General Research Institute for Nonferrous Metals, Beijing 650106, China |
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Abstract The phase transformation temperature, microstructure and texturein pure Co block were analyzed using in situ X-ray diffraction (XRD), scanning electron microscope (SEM) and electron backscattering diffraction(EBSD) in the paper. The results showed that, As was about 400 ℃, Af was about 500 ℃, Ms was about 350 ℃, and Mf was below room temperature. The more undercooling degree and longer duration were needed during α→β phase transformation could be deduced. The main reason was the thermal enthalpy could not satisfy the interface and strain energy. Lamellar structure parallel to {0002}β formed as the stacking fault and anisotropy line strain. Meanwhile, the 70°〈1120〉 lath and 90°〈1120〉 wedge twin structure were born in order to eliminate the 0.6% bulk strain. The macro texture weakened correspondingly as more variants were occurred and twin structure was born.
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Published: 16 July 2021
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| Fund:National Test and Evaluation Platform for Advanced Materials- Primary Center, National Test and Evaluation Platform for Advanced Materials- Nonferrous Metals, the Major Research and Development Projects of Jiangxi province (20194ABC28004). |
| About author:: Shuming Wang received M.S. degrees in June 2006 from General Research Institute for Nonferrous Metals. He is a senior engineer in Guobiao (Beijing) Testing & Certification Co., Ltd, and participates in XRD analysis, crystal structure, micro morphology. Published about 20 academic papers, applied nearly 10 patterns. |
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