The effects of bimodal microstructure characteristics on susceptibility to adiabatic shear bands of modified Ti-6AI-4V alloys

Dongmei Huo, Shukui Li, Qunbo Fan, Jianchong Li

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

This work reported an examination about the effects of bimodal microstructure characteristics on the susceptibility to adiabtatic shear bands for modified Ti-6A1-4V alloys subjected to high-strain-rate deformation. The obtained microstructures with different bimodal characteristic parameters under different heat-treatment conditions underwent dynamic shearing experiments using the technology of Split Hopkinson Pressure Bar. The results indicate that the volume fraction of primary alpha phase is reduced and that of secondary alpha phase precipitated within the beta matrix increases with increasing the solution temperature. When the solution temperature exceeds 860°C , the size of secondary alpha phase significantly increases. It is found that a large number of precipitated thin secondary alpha phase distribute dispersedly within the beta matrix at 860°C , while it keeps a relatively lower number of secondary alpha phase at other solution temperatures. Correspondingly,the possibility of local enormous plastic deformation is reduced due to the significant increase of alhpa/beta phase interfaces. Hence, the bimodal microstructure treated at 860°C show the least susceptibility to the adialbatic shear bands.

源语言英语
主期刊名Ti 2011 - Proceedings of the 12th World Conference on Titanium
1074-1078
页数5
出版状态已出版 - 2012
活动12th World Conference on Titanium, Ti 2011 - Beijing, 中国
期限: 19 6月 201124 6月 2011

出版系列

姓名Ti 2011 - Proceedings of the 12th World Conference on Titanium
2

会议

会议12th World Conference on Titanium, Ti 2011
国家/地区中国
Beijing
时期19/06/1124/06/11

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引用此

Huo, D., Li, S., Fan, Q., & Li, J. (2012). The effects of bimodal microstructure characteristics on susceptibility to adiabatic shear bands of modified Ti-6AI-4V alloys. 在 Ti 2011 - Proceedings of the 12th World Conference on Titanium (页码 1074-1078). (Ti 2011 - Proceedings of the 12th World Conference on Titanium; 卷 2).