近等温锻造后TC21钛合金的显微组织及力学性能

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Bibliographic Details
Published in	中国有色金属学报：英文版 Vol. 25; no. 1; pp. 72 - 79
Main Author	石志峰郭鸿镇刘瑞王晓晨姚泽坤
Format	Journal Article
Language	English
Published	2015
Subjects	TC21钛合金 α相形貌拉伸性能显微组织残留β基体近等温锻造
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Bibliography:	43-1239/TG TC21 titanium alloy;near-isothermal forging;microstructure;α phase morphology;residual β matrix;tensile properties Microstructure and tensile properties of TC21 titanium alloy after near-isothermal forging with different parameters plus solution treatment and aging were investigated. It is found that the residual β matrix, which was strengthened by fine secondary α platelets forming during aging, exists in all the samples; while primary equiaxed α phase, bent lamellar α phase and α plates are simultaneously or individually present in one sample. The strength of alloy increases proportionally with increasing the content of residual β matrix, which is the result of increasing α/β interphase boundary. The plasticity of alloy has a downward trend as the content of residual β matrix increases. This attributes to the increase of fine secondary α platelets, which are cut by dislocations during the deformation. Additionally, coarse α plates with long axis parallel to the maximum resolved shear stress（MRSS） also reduce the plasticity of TC21 alloy. Zhi-feng SHI,Hong-zhen GUO,Rui LIU,Xiao-chen WANG,Ze-kun YAO（1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi＇an 710072, China; 2. School of Aeronautics, Northwestern Polytechnical University, Xi＇an 710072, China）
ISSN:	1003-6326