高Al含量的亚稳β型Ti-Al-Mo-Nb-V系列钛合金的组织与力学性能

doi:10.11896/cldb.22040297

材料导报

2024, Vol. 38

Issue (2): 22040297-6 https://doi.org/10.11896/cldb.22040297

金属与金属基复合材料

高Al含量的亚稳β型Ti-Al-Mo-Nb-V系列钛合金的组织与力学性能

张健¹, 朱智浩¹, 张爽², 董闯^1,*

1 大连理工大学三束材料改性教育部重点实验室,辽宁大连 116024
2 大连交通大学材料科学与工程学院,辽宁大连 116028

Microstructure and Mechanical Properties of Ti-Al-Mo-Nb-V Metastable β-type Alloys Alloying with High Al Content

ZHANG Jian¹, ZHU Zhihao¹, ZHANG Shuang², DONG Chuang^1,*

1 Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology) Ministry of Education, Dalian 116024, Liao-ning, China
2 School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning, China

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摘要目前,亚稳β钛合金的成分朝着更高Al含量和更高β稳定元素含量的方向发展,本工作基于典型亚稳β钛合金β-21S和TB18的成分设计思路,添加了更高含量的Al元素,同时添加了Mo、Nb、V三种β稳定元素,设计并利用铜模吸铸法制备了高Al含量的亚稳β型Ti-Al-(Mo,Nb,V)系列钛合金。结果表明,Ti-6.5Al-1.5V-11.5Mo-2.8Nb合金在吸铸态下的β相结构达到临界稳定状态。此时,该合金的拉伸屈服强度为623 MPa,延伸率为16.6%,其屈服强度略低于对标合金TB18,但延伸率明显高于同系列合金和TB18合金,具有最佳的综合力学性能。此外,该合金液固温区为31 ℃,在同系列合金中最低,且明显低于对标合金TB18的液固温区238 ℃。

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关键词: 亚稳β钛合金高Al含量显微组织力学性能

Abstract: At present, the composition of metastable β-titanium alloys is developing towards higher β-stable elements and higher Al content. In this work, Ti-Al-(Mo, Nb, V) metastable β-type alloys were first designed via higher Al content and Mo, Nb and V co-alloying after analyzing the composition of typical metastable β-Ti β-21S and TB18, and prepared by copper-mold suction-casting method. It was found that Ti-6.5Al-1.5V-11.5Mo-2.8Nb alloy possesses a critical stable β-phase structure at as-cast state. At this time, this alloy shows excellent tensile yield strength of 623 MPa and elongation of 16.6%, with the best comprehensive mechanical properties, of which its yield strength is slightly lower than that of the reference TB18 alloy, but the elongation is significantly higher than those of same alloy series and TB18 alloy. In addition, its solidification ranges is 31 ℃, which is lower than that of the same series of alloys, particularly much below the 238 ℃ of TB18 alloy.

Key words: metastable β-titanium alloy high Al content microstructure mechanical property

出版日期: 2024-01-25 发布日期: 2024-01-26

ZTFLH:

TG146.2

基金资助: 大连市科技创新基金重点学科重大课题(2020JJ25CY004);军委科技委2020年重点基础研究项目(2020JCJQZD165)

通讯作者: *董闯,大连理工大学材料科学与工程学院教授、博士研究生导师。1988年7月本硕毕业于大连理工大学材料科学与工程学院,1991年7月在法国洛林国立理工大学材料学院取得博士学位,1992—1994年分别在法国南锡矿业学院和中国科学院北京电子显微镜重点实验室进行博士后研究工作。先后获得国家教委科技进步一等奖、辽宁省青年科技拔尖人才、国家百千万人才工程、大连市优秀专家、国务院颁发的政府特殊津贴、中国青年科技奖、辽宁省十大杰出青年、中国大陆高引用SCI论文奖、辽宁省青年学科带头人、教育部长江奖励计划特聘教授等。主要从事载能束材料改性、准晶及非晶材料、合金相成分设计、材料微结构的研究。近年来,著有《准晶材料》(1998,国防工业出版社),发表论文 100 余篇,SCI引用总次数为530,单篇最高为94次,申请专利4项。dong@dlut.edu.cn

作者简介: 张健,2020年6月于中国地质大学(武汉)获得工学学士学位。现为大连理工大学材料科学与工程学院硕士研究生,在董闯教授的指导下进行研究。目前主要研究领域为基于团簇加连接原子模型的β-Ti合金成分设计。

引用本文:

张健, 朱智浩, 张爽, 董闯. 高Al含量的亚稳β型Ti-Al-Mo-Nb-V系列钛合金的组织与力学性能[J]. 材料导报, 2024, 38(2): 22040297-6.
ZHANG Jian, ZHU Zhihao, ZHANG Shuang, DONG Chuang. Microstructure and Mechanical Properties of Ti-Al-Mo-Nb-V Metastable β-type Alloys Alloying with High Al Content. Materials Reports, 2024, 38(2): 22040297-6.

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http://www.mater-rep.com/CN/10.11896/cldb.22040297 或 http://www.mater-rep.com/CN/Y2024/V38/I2/22040297

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