固溶温度对<strong>Ti-4Al-6Mo-2V-5Cr-2Zr</strong>钛合金的组织和拉伸性能的影响

doi:10.11901/1005.3093.2021.601

材料研究学报

2022, Vol. 36

Issue (12): 893-899 DOI: 10.11901/1005.3093.2021.601

研究论文

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固溶温度对Ti-4Al-6Mo-2V-5Cr-2Zr钛合金的组织和拉伸性能的影响

王圣元¹, 张浩宇¹, 周舸¹, 陈晓博², 陈立佳¹(

)

^1.沈阳工业大学材料科学与工程学院沈阳 110870
^2.澳大利亚皇家墨尔本理工大学工程学院;Carlton 3053 澳大利亚

Effect of Solution Treatment Temperature on Microstructure and Tensile Properties of Ti-4Al-6Mo-2V-5Cr-2Zr Alloy

WANG Shengyuan¹, ZHANG Haoyu¹, ZHOU Ge¹, CHEN Xiaobo², CHEN Lijia¹(

)

^1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
^2.School of Engineering, RMIT University, Carlton 3053, Australia

引用本文:

王圣元, 张浩宇, 周舸, 陈晓博, 陈立佳. 固溶温度对Ti-4Al-6Mo-2V-5Cr-2Zr钛合金的组织和拉伸性能的影响[J]. 材料研究学报, 2022, 36(12): 893-899.
Shengyuan WANG, Haoyu ZHANG, Ge ZHOU, Xiaobo CHEN, Lijia CHEN. Effect of Solution Treatment Temperature on Microstructure and Tensile Properties of Ti-4Al-6Mo-2V-5Cr-2Zr Alloy[J]. Chinese Journal of Materials Research, 2022, 36(12): 893-899.

全文: PDF(14576 KB) HTML

摘要:

研究了固溶温度对一种亚稳β钛合金(Ti-4Al-6Mo-2V-5Cr-2Zr)的锻态组织和室温拉伸性能的影响。结果表明，固溶温度低于相变点时大量的α相在β基体中析出并聚集在滑移带附近，随着固溶温度接近相变点α相的数量减少且部分滑移带消失。固溶温度高于相变点时显微组织为单一的β相且滑移带完全消失，随着固溶温度继续升高β晶粒聚集且长大。这种合金经750℃×1 h固溶处理后达到良好的强度塑性匹配，气抗拉强度、屈服强度和伸长率分别为957 MPa、887 MPa和11.7%。

关键词 ：金属材料, β钛合金, 固溶处理, 显微组织, α相, 拉伸性能

Abstract：

A novel metastable β-Ti alloy (Ti-4Al-6Mo-2V-5Cr-2Zr) was designed, melt and wrought to prepare plates. Then the effect of solution treatment temperature on the microstructure and room temperature tensile properties of the as wrought alloy was investigated. Results show that a large number of α-phase precipitates from the β-matrix and gathers near slip bands when the solution temperature is lower than the phase transition temperature of the alloy. As the solution temperature approaches the phase transition temperature, the quantity of α-phase decreases and a part of the slip bands disappears. When the solution temperature is above the phase transition temperature, the alloy microstructure is composed fully of β-phase, while the slip bands disappear completely. As the solution temperature continues to rise, β-phase grains tend to aggregate and grow up. The alloy presents a good matching of strength and plasticity after solution treatment at 750℃×1 h. The corresponding ultimate tensile strength, yield strength and elongation are 957 MPa, 887 MPa and 11.7%, respectively.

Key words： metallic materials β titanium alloy solution treatment microstructure α phase tensile property

收稿日期: 2021-10-26

ZTFLH:

TG146.2+3

基金资助:国家自然科学基金(52104379)

作者简介: 王圣元，男，1994年生，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.601 或 https://www.cjmr.org/CN/Y2022/V36/I12/893

表1 Ti-4Al-6Mo-2V-5Cr-2Zr合金的化学成分

图1 锻态Ti-4Al-6Mo-2V-5Cr-2Zr合金的光学显微组织和XRD谱

表2 Ti-4Al-6Mo-2V-5Cr-2Zr合金的固溶处理工艺参数

图2 Ti-4Al-6Mo-2V-5Cr-2Zr合金在相变点以下固溶处理1 h后的显微组织

图3 Ti-4Al-6Mo-2V-5Cr-2Zr合金在相变点以上固溶1 h后的EBSD-IPF图和相分布

图4 不同处理状态Ti-4Al-6Mo-2V-5Cr-2Zr合金的显微组织

表3 不同热处理状态Ti-4Al-6Mo-2V-5Cr-2Zr合金的拉伸性能

图5 Ti-4Al-6Mo-2V-5Cr-2Zr合金在不同温度固溶处理后的拉伸断口形貌

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