NiTi-W原位复合材料的马氏体相变与性能

doi:10.13251/j.issn.0254-6051.2020.06.029

金属热处理 ›› 2020, Vol. 45 ›› Issue (6): 136-140.DOI: 10.13251/j.issn.0254-6051.2020.06.029

NiTi-W原位复合材料的马氏体相变与性能

姜江¹, 姜大强², 郝世杰², 蒋小华², 郭方敏², 崔立山²

1. 江西省科学院江西省铜钨新材料重点实验室, 江西南昌 330096;
2. 中国石油大学北京材料科学与工程学院, 北京 102249

收稿日期:2019-12-19 出版日期:2020-06-25 发布日期:2020-09-02
作者简介:姜江(1981—),男,副研究员,博士,主要研究方向为NiTi基复合材料及高性能铜材料,E-mail: superjj1981@163.com
基金资助:
国家自然科学基金重点项目(51731010);国家自然科学基金(51571212,51861011);江西省自然科学基金(20171ACB21068);江西省重点研发计划项目(20171BBH80009)

Martensitic transformation and properties of in-situ NiTi-W composite

Jiang Jiang¹, Jiang Daqiang², Hao Shijie², Jiang Xiaohua², Guo Fangmin², Cui Lishan²

1. Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang Jiangxi 330096, China;
2. Department of Materials Science and Engineering, China University of Petroleum-Beijing, Beijing 102249, China

Received:2019-12-19 Online:2020-06-25 Published:2020-09-02

摘要/Abstract

摘要： 为获得高性能NiTi基记忆合金复合材料,通过熔炼、锻造、拔丝等手段获得一种NiTi-W原位复合材料。利用SEM扫描电镜观察材料显微组织;DSC测试材料的马氏体相变行为;利用WDT II-20万能拉伸试验机测试材料的力学性能。SEM分析结果显示,拔丝加工使W纤维直径细化至几微米,甚至亚微米级别,在NiTi基体中沿拔丝方向一致排布。DSC测试结果显示,材料经不同温度退火后展现出复杂的可逆马氏体相变行为,在某些升、降温曲线上出现多个吸放热峰现象。拉伸测试结果显示,600 ℃退火样品经适当的预拉伸变形后,屈服强度会大大增加,由~200 MPa提升到~800 MPa,断裂应力超过1 GPa,断裂应变高达40%,材料展现出优秀的线性超弹性,是一种集高强度、高塑性、高线性超弹性于一身的高性能材料。

关键词: NiTi-W原位复合材料, 马氏体相变, 线性超弹

Abstract: In order to obtain high performance NiTi based composite, an in-situ NiTi-W composite was prepared by means of vacuum arc melting, hot forging and wire drawing. Microstructure of the composite was observed by means of SEM. Reversible martensitic transformation behavior was measured by DSC, and tensile tests were conducted on WDT II-20 testing machine. SEM results show that the W fibers are refined to a few microns or even submicron scale and are elongated along the drawing direction. DSC test results show that the material shows complex reversible martensitic transformation behavior after annealing at different temperatures, and many heat absorption and desorption peaks are observed on heating and cooling thermal cycles curves. Tensile tests reveal that the yield strength of 600 ℃ annealed specimen increases greatly from about 200 MPa to about 800 MPa after pre-stretching deformation, the fracture stress is more than 1 GPa, and the fracture strain is as high as 40%. Furthermore, the specimen shows excellent linear hyperelasticity. Therefore, the composite should be a high-performance material with high strength, high plasticity and high linear hyperelasticity.

Key words: NiTi-W in-situ composite, martensitic transformation, linear superelasticity

中图分类号:

TB34

姜江, 姜大强, 郝世杰, 蒋小华, 郭方敏, 崔立山. NiTi-W原位复合材料的马氏体相变与性能[J]. 金属热处理, 2020, 45(6): 136-140.

Jiang Jiang, Jiang Daqiang, Hao Shijie, Jiang Xiaohua, Guo Fangmin, Cui Lishan. Martensitic transformation and properties of in-situ NiTi-W composite[J]. Heat Treatment of Metals, 2020, 45(6): 136-140.

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NiTi-W原位复合材料的马氏体相变与性能

Martensitic transformation and properties of in-situ NiTi-W composite

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