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固溶态Ti-41Nb合金的微观组织与力学行为研究
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1.江苏大学;2.有科期刊出版(北京)有限公司;3.江苏航空职业技术学院

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国家自然科学基金资助(项目号51771082);镇江市科技计划资助(项目号GY2020001)


Study on Microstructure and Mechanical Behavior of Solution treated Ti-41Nb Alloy
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1.Jiangsu University;2.Jiangsu Aviation Technical College

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    摘要:

    采用光学显微镜、力学性能测试和原位同步辐射高能X射线衍射等方法系统地研究了固溶态Ti-41Nb合金的微观组织与力学行为。研究结果表明,Ti-41Nb合金经800℃固溶淬火处理后,其等轴β基体上分布着微量的板条状α″马氏体,呈现典型的双相结构。在拉伸过程中,固溶态Ti-41Nb合金除发生弹性变形外,还发生了β→α″应力诱发马氏体相变。应力诱发马氏体相变在0.0-3.3%应变范围内较剧烈,在3.3-4.0%应变范围内相对轻微。在随后的卸载过程中,固溶态Ti-41Nb合金发生了弹性回复,同时伴随着α″→β逆马氏体相变。卸载后,固溶态Ti-41Nb合金中仍有大量的α″马氏体未转变为β母相,这导致合金仍有2.9%的残余应变。

    Abstract:

    The microstructure and mechanical behavior of solution treated Ti-41Nb alloy were systematically investigated by optical microscope, tensile test and in situ synchrotron high-energy X-ray diffraction. After solution treated at 800℃ plus water quenching, Ti-41Nb alloy presents a typical dual-phase structure which is characterized by exiguous lath-shaped α" martensite distributed on the equiaxed β matrix. The stress induced martensitic transformation (SIMT), together with elastic deformation, takes place concurrently during loading. The stress-induced martensitic transformation from β to α″ takes place intensively in the strain range from 0.0% to 3.3% but slightly from 3.3% to 4.0%. In the subsequent unloading process, the solution treated Ti-41Nb alloy undergoes elastic recovery, accompanied by the reverse martensitic transformation from α″ to β. After unloading, a large amount of α″ martensite has not been transformed into β parent phase, which results in a residual strain of 2.9%.

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侯艳嫔,柳青,沈宝国,师平,谢中敏,张慧慧,吴亭慧,郭顺.固溶态Ti-41Nb合金的微观组织与力学行为研究[J].稀有金属材料与工程,2021,50(9):3213~3217.[Hou Yanpin, Liu Qing, Shen Baoguo, Shi Ping, Xie Zhongmin, Zhang Huihui, Wu Tinghui, Guo Shun. Study on Microstructure and Mechanical Behavior of Solution treated Ti-41Nb Alloy[J]. Rare Metal Materials and Engineering,2021,50(9):3213~3217.]
DOI:10.12442/j. issn.1002-185X.20200875

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历史
  • 收稿日期:2020-11-12
  • 最后修改日期:2021-06-22
  • 录用日期:2021-06-29
  • 在线发布日期: 2021-09-27
  • 出版日期: 2021-09-24