Influences of Solution and Aging Temperature on Microstructure and Mechanical Properties of the IMI834 Alloy

Shi Puying; Zhang Yongqiang; Sun Feng; Sun Xiaoping; Zhang Xiaoyuan; Lai Yunjin; Wang Kaixuan

doi:10.15980/j.tzzz.2017.09.003

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Influences of Solution and Aging Temperature on Microstructure and Mechanical Properties of the IMI834 Alloy
Vol. 37, Issue 9, Pages: 936-939(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.09.003

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[1]史蒲英,张永强,孙峰,孙小平,张晓园,赖运金,王凯旋.固溶时效温度对IMI834钛合金组织和性能的影响[J].特种铸造及有色合金,2017,37(09):936-939.

Shi Puying, Zhang Yongqiang, Sun Feng, et al. Influences of Solution and Aging Temperature on Microstructure and Mechanical Properties of the IMI834 Alloy. [J]. Special Casting & Nonferrous Alloys 37(9):936-939(2017)
[1]史蒲英,张永强,孙峰,孙小平,张晓园,赖运金,王凯旋.固溶时效温度对IMI834钛合金组织和性能的影响[J].特种铸造及有色合金,2017,37(09):936-939. DOI： 10.15980/j.tzzz.2017.09.003.

Shi Puying, Zhang Yongqiang, Sun Feng, et al. Influences of Solution and Aging Temperature on Microstructure and Mechanical Properties of the IMI834 Alloy. [J]. Special Casting & Nonferrous Alloys 37(9):936-939(2017) DOI： 10.15980/j.tzzz.2017.09.003.

摘要

研究了IMI834钛合金棒材经不同固溶和时效热处理后的显微组织和性能

以期获得固溶和时效与合金组织性能的对应关系以及最优热处理工艺。结果表明

抗拉强度和屈服强度随固溶温度的升高先升高后降低

最大强度和塑性值出现在1 005

sup

1 025℃之间;合金的室温和高温强度及高温断面收缩率随时效温度升高先降低后增加;伸长率及室温断面收缩率先略升高后略降低

合金组织随时效温度变化不明显;拉伸断裂过程中

裂纹在初生α相处萌生;锻态IMI834合金的最佳热处理工艺为（1 005

025℃）×2h+水淬+（750

00℃）×2h+空冷。

Abstract

Effects of different solid solution and aging treatment on microstructure and mechanical properties of IMI834 Ti alloy were investigated to understand the relation of solid solution and aging treatment with microstructure and properties of the alloy as well as the optimized heat treatment parameters.The results reveal that with increasing in solid solution temperature

tensile strength and yield strength of the alloy exhibit increased firstly and then decreased in form of parabolic.The maximum strength and elongation of the alloy can be observed in range of 1 005

025 ℃.The room and elevated strength as well as elevated contrac-tion of area are increased firstly and then decreased with increasing in aging temperature.Elongation and ambient contraction of area is increased slightly firstly and then decreased slightly.Microstructural evolution of alloy can be ignored with increasing in aging temperature.During tensile crack process

crack is generated at theαphase.The optimized heat treatment process for the asforged IMI834 alloy is presented as follows:solid solution at（1 005

025 ℃）×2 h+ water quenching+aging at（750

00 ℃）×2h +air cooling.