Effects of Solution Aging Temperature on Microstructure and Properties of Ti-6Al-4V-0.5Si Alloy

Xie Wenfang; Guo Leiming; Zhang Miaofei; Liu Yazhou

doi:10.15980/j.tzzz.2020.04.023

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Effects of Solution Aging Temperature on Microstructure and Properties of Ti-6Al-4V-0.5Si Alloy
Vol. 40, Issue 4, Pages: 449-452(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.04.023

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[1]谢文芳,郭雷明,张淼斐,刘亚洲.固溶时效温度对Ti-6Al-4V-0.5Si合金组织性能的影响[J].特种铸造及有色合金,2020,40(04):449-452.

Xie Wenfang, Guo Leiming, Zhang Miaofei, et al. Effects of Solution Aging Temperature on Microstructure and Properties of Ti-6Al-4V-0.5Si Alloy. [J]. Special Casting & Nonferrous Alloys 40(4):449-452(2020)
[1]谢文芳,郭雷明,张淼斐,刘亚洲.固溶时效温度对Ti-6Al-4V-0.5Si合金组织性能的影响[J].特种铸造及有色合金,2020,40(04):449-452. DOI： 10.15980/j.tzzz.2020.04.023.

Xie Wenfang, Guo Leiming, Zhang Miaofei, et al. Effects of Solution Aging Temperature on Microstructure and Properties of Ti-6Al-4V-0.5Si Alloy. [J]. Special Casting & Nonferrous Alloys 40(4):449-452(2020) DOI： 10.15980/j.tzzz.2020.04.023.

摘要

分析了不同固溶时效温度对Ti-6Al-4V-0.5Si合金抗拉强度、伸长率及显微组织的影响。结果表明

固溶处理后Ti-6Al-4V-0.5Si合金中存在较多的六方α′和斜方α″两种马氏体相和亚稳定相。时效处理后

马氏体相和亚稳定相分解再结晶得到分散的α+β相。综合分析表明

固溶时效工艺为950℃×30min（水冷

WQ）+480℃×4h（空冷

AQ）

合金的综合性能最好

此时合金的抗拉强度和伸长率分别为745.6MPa和8.3%

比铸态合金分别提高了24.8%和36.0%。

Abstract

The effects of solution aging temperature on the tensile strength

elongation

morphology and phase composition of Ti-6Al-4V-0.5Si alloy were analyzed.The results show that there are more hexagonalα′and obliqueα″martensite phases in Ti-6Al-4V-0.5Si alloy after solution treatment.After aging treatment

the martensite phase is decomposed and recrystallized to form dispersedα+βphase.Comprehensive analysis shows that the comprehensive properties of the alloy present desirable with solution 950℃ for 30 min and water quenching and aging at 480℃ for 4 hand air quenching

where the tensile strength and elongation reach 745.6 MPa and 8.3%

respectively

which are 24.8% and 36.0% higher than those of as-cast ones.