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纳米TiB/Al-Cu-Mn复合材料的微观结构演变、拉伸性能及加工硬化行为研究

An Investigation of Microstructural Evolution, Tensile Properties and Work-Hardening Behavior of Nanosized TiB/Al-Cu-Mn Composites.

作者信息

Xia Cun Juan, Wang Lei, Zhang Qing, Zhu Hao Fei, Liu Jun, Zhang Feng Guo, Chen Zhe, Wang Hao Wei

机构信息

State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.

School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

出版信息

Materials (Basel). 2020 Sep 24;13(19):4250. doi: 10.3390/ma13194250.

DOI:10.3390/ma13194250
PMID:32987698
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579223/
Abstract

The microstructure evolution, tensile properties and work-hardening behavior of AA2219 alloy reinforced by in situ nanosized TiB particles were studied in this paper. The observation indicated an impeded recrystallization of the matrix alloy by nanosized TiB particles, and the hybrids of nanosized TiB particles and AlCu phases located at the grain boundary hindered the grain growth. Meanwhile, a large amount fiber textures of <111>//RD (Rolling direction), <110>//RD, <100>//RD <111>//ND (Normal direction), <110>//ND and <100>//ND were detected in nanosized TiB/AA2219 composite. Tensile test results exhibited a combination of good strength and ductility of the present composite whose yield strength and tensile strength were 11.4% and 5.8% higher than those of the alloy, while its fracture strain increased slightly. Meanwhile, the correlation between this modified microstructure of nanosized TiB particles and comprehensive mechanical properties was established. This study provides a new insight into the fabrication and strengthening behaviors of Al matrix composites reinforced by in situ nanoparticles.

摘要

本文研究了原位纳米TiB颗粒增强AA2219合金的微观结构演变、拉伸性能和加工硬化行为。观察结果表明，纳米TiB颗粒阻碍了基体合金的再结晶，位于晶界的纳米TiB颗粒与AlCu相的混合体阻碍了晶粒生长。同时，在纳米TiB/AA2219复合材料中检测到大量<111>//RD（轧制方向）、<110>//RD、<100>//RD、<111>//ND（法线方向）、<110>//ND和<100>//ND的纤维织构。拉伸试验结果表明，该复合材料具有良好的强度和延展性，其屈服强度和抗拉强度比合金分别提高了11.4%和5.8%，而其断裂应变略有增加。同时，建立了纳米TiB颗粒这种改性微观结构与综合力学性能之间的相关性。本研究为原位纳米颗粒增强铝基复合材料的制备和强化行为提供了新的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/734b8e56cdfe/materials-13-04250-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/307ecddaeab4/materials-13-04250-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/5d49fd7f965c/materials-13-04250-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/da84e33dc15c/materials-13-04250-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/9963f539a144/materials-13-04250-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/8c2e7595898b/materials-13-04250-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/3ff79123f139/materials-13-04250-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/d7b866f160eb/materials-13-04250-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/ad146cd1ecee/materials-13-04250-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/c97f15beba0f/materials-13-04250-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/734b8e56cdfe/materials-13-04250-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/307ecddaeab4/materials-13-04250-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/5d49fd7f965c/materials-13-04250-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/da84e33dc15c/materials-13-04250-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/9963f539a144/materials-13-04250-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/8c2e7595898b/materials-13-04250-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/3ff79123f139/materials-13-04250-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/d7b866f160eb/materials-13-04250-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/ad146cd1ecee/materials-13-04250-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/c97f15beba0f/materials-13-04250-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/367b/7579223/734b8e56cdfe/materials-13-04250-g010.jpg

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