Influence of heat treatment on the microstructure and mechanical properties of TC17 Titanium Alloy

被引：3

作者：

Wang Min ^{[1
]}

Huang Darong ^{[1
]}

Fan Ya ^{[1
]}

Nin YongQuan ^{[1
]}

Guo Hongzhen ^{[1
]}

Yao Zekun ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China

来源：

5TH INTERNATIONAL CONFERENCE ON NEW FORMING TECHNOLOGY (ICNFT 2018) | 2018年 / 190卷

关键词：

Heat treatment; Forging; Microstructure; FRACTURE-TOUGHNESS;

D O I：

10.1051/matecconf/201819007002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of heat treatment on the microstructure and mechanical properties of TC17 titanium alloy was investigated by changing holding time before forging and aging temperature after beta-forging. A better heat treatment mechanism was chosen according to its working requirements. The results showed that the holding time and aging temperature had a significant influence on microstructures and mechanical properties of TC17 alloy. With the increase of holding time before forging in the single beta phase region, the original beta grain size enlarge, the strength and fracture toughness decrease, and the plasticity increases. The size of lamellar alpha-phase bundles enlarge with the rise of aging temperature after beta-forging, the orientated relationship becomes simple, and the content of beta-transformation increases. And the plasticity and fracture toughness of the alloy increase, the strength and hardness decreases. The fracture toughness is better under the heat treatment mechanism at 873 degrees C/2h +918 degrees C/64min before forging, 800 degrees C/4h,WC+660 degrees C/8h AC after forging, with the high and low cycle fatigue properties meet the technical requirements.

引用

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