时效处理对Ti-3Al-8V-6Cr-4Mo-4Zr合金力学性能的影响

doi:10.11901/1005.3093.2016.267

材料研究学报

2017, Vol. 31

Issue (6): 409-414 DOI: 10.11901/1005.3093.2016.267

本期目录 | 过刊浏览

时效处理对Ti-3Al-8V-6Cr-4Mo-4Zr合金力学性能的影响

王雪萌,张思倩(

),袁子尧,陈立佳

沈阳工业大学材料科学与工程学院沈阳 110870

Effect of Heat Treatment on Mechanical Properties of Ti-3Al-8V-6Cr-4Mo-4Zr Alloy

Xuemeng WANG,Siqian ZHANG(

),Ziyao YUAN,Lijia CHEN

School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

引用本文:

王雪萌,张思倩,袁子尧,陈立佳. 时效处理对Ti-3Al-8V-6Cr-4Mo-4Zr合金力学性能的影响[J]. 材料研究学报, 2017, 31(6): 409-414.
Xuemeng WANG, Siqian ZHANG, Ziyao YUAN, Lijia CHEN. Effect of Heat Treatment on Mechanical Properties of Ti-3Al-8V-6Cr-4Mo-4Zr Alloy[J]. Chinese Journal of Materials Research, 2017, 31(6): 409-414.

全文: PDF(6077 KB) HTML

摘要:

研究了固溶时效处理对Ti-3Al-8V-6Cr-4Mo-4Zr合金拉伸性能的影响。结果表明：在800℃/30 min+500℃/12 h处理后,合金的硬度和抗拉强度达到极大值,其延伸率和断面收缩率没有明显的降低。合金的硬度和强度的提高是ω和α析出相共同作用的结果。在合金的热轧态和热处理态的断口都出现了大量的韧窝,表明其为典型的韧性断裂。

关键词 ：金属材料, 固溶时效处理, 拉伸性能, 断口

Abstract：

The effects of solution treatment and aging treatment on microstructures and mechanical properties of Ti-3Al-8V-6Cr-4Mo-4Zr alloy bars have been investigated. The results show that the highest hardness and the highest tensile strength can be achieved by the solution and aging treatment (800℃×30 min/AC+510℃×16 h/AC), and an insignificant decline on elongation rate and necking rate is also acquired. The quantity and size of the ω-phases and α-phases result in the increase of hardness and strength of Ti-3Al-8V-6Cr-4Mo-4Zr alloy bars. A lot of dimples exist in the tensile fractures of the hot rolling alloys and heat treatment alloysdemonstrating a typical ductile fracture.

Key words： metal materials solution and aging treatment tensile properties tensile fracture

收稿日期: 2016-05-18

基金资助:国家自然科学基金(51101160, 51501117),辽宁省教育厅项目(L2014050)

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.267 或 https://www.cjmr.org/CN/Y2017/V31/I6/409

图1 Ti-3Al-8V-6Cr-4Mo-4Zr合金在350~550℃时效后的硬度

图2 原始态和不同热处理态Ti-3Al-8V-6Cr-4Mo-4Zr合金的SEM照片

表1 Ti-3Al-8V-6Cr-4Mo-4Zr合金在不同状态下的拉伸性能

图3 Ti-3Al-8V-6Cr-4Mo-4Zr合金在不同状态下的拉伸断口照片

图4 Ti-3Al-8V-6Cr-4Mo-4Zr合金在不同状态下拉伸变形后的显微组织

图5 Ti-3Al-8V-6Cr-4Mo-4Zr合金经800℃/30 min+500℃/12 h处理后拉伸试样中位错的形貌

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