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2026, 04, 107-113
高镍奥氏体不锈钢微丝在冷拉拔过程中的微结构及力学性能演变
基金项目(Foundation): 国家重点研发计划资助项目(2024YFB3713702)
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发布时间: 2026-07-15
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摘要:

以高镍奥氏体不锈钢微丝为研究对象,研究了其在大应变冷拉拔过程中的微结构与力学性能演变。通过结合多种微结构表征技术与力学性能测试,揭示了材料的变形与强化机制。结果表明,材料在拉拔过程中保持单相奥氏体结构,抗拉强度由 560 MPa 显著提升至 2200 MPa。变形孪生与位错滑移是该材料的主导变形机制。随拉拔应变量增加,高密度变形孪晶界对原始晶粒产生强烈分割,形成亚微米/纳米尺度的孪晶片层结构。本研究可为超高强度奥氏体不锈钢微丝的研发提供理论指导。

Abstract:

This study systematically investigates the microstructural evolution and mechanical properties of a high nickel austenitic stainless steel microwire subjected to large strain cold drawing. By combining multiple microstructural characterization techniques with mechanical property measurements,the deformation and strengthening mechanisms of the material are elucidated. The results show that the material remains single phase austenitic during the drawing process, and the tensile strength increases significantly from 560 MPa to 2200 MPa. Deformation twinning and dislocation slip are identified as the dominant deformation mechanisms. With an increase of drawing strain, the high density of deformation twin boundaries effectively subdivides the original grains, resulting in the formation of a submicron/nano scale twin lamellar structure. This study provides theoretical guidance for the development of ultra high strength austenitic stainless steel microwires.

参考文献

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基本信息:

引用信息:

[1]尉永杰,解羽佳,付武靖,等.高镍奥氏体不锈钢微丝在冷拉拔过程中的微结构及力学性能演变[J],2026(04):107-113.

基金信息:

国家重点研发计划资助项目(2024YFB3713702)

发布时间:

2026-07-15

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