Enhanced ductility in harmonic structure designed SUS316L produced by high energy ball milling and hot isostatic sintering
Enhanced ductility in harmonic structure designed SUS316L produced by high energy ball milling and hot isostatic sintering
复制标题
通过高能球磨和热等静压烧结生产的SUS316L，谐波结构增强延展性
DOI：
10.1016/j.msea.2016.07.048
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发表时间：
2016-09
期刊：
影响因子：
6.4
通讯作者：
Ameyama Kei
中科院分区：
文献类型：
--
作者：
Zheng Ruixiao;Zhang Zhe;Nakatani Masashi;Ota Mie;Chen Xu;Ma Chaoli;Ameyama Kei
本研究的目的是通过谐波结构设计优化商业SUS 316L不锈钢的力学性能。采用高能球磨和热等静压工艺制备了具有谐波结构的SUS 316L压坯。虽然谐波结构的压坯具有双峰晶粒尺寸分布，我们的调查表明，硬度和屈服强度仍然很好地类似于Hall-Petch关系。SUS 316L复合材料具有良好的屈服强度和均匀延伸率（σy=695 MPa，εu=27.1%）。塑性的提高是由于粗晶组织引起的应变硬化和超细晶组织特有的宏观网络引起的额外应变硬化。结果表明，核晶粒尺寸约为1.2 μm，壳层体积分数约为50-60%是奥氏体不锈钢的最佳谐波组织设计。
The objective of the present study is to optimize the mechanical properties of commercial SUS316L stainless steel through harmonic structure design. The harmonic structured SUS316L compacts were fabricated by a process including high energy ball milling and subsequent hot isostatic pressing. Although the harmonic structured compacts had a bimodal grain size distribution, our investigations showed that both hardness and yield strength still well resembled the Hall-Petch relationship. A great combination of high yield strength and improved uniform elongation can be achieved simultaneously in the harmonic structured SUS316L compacts (σy=695 MPa, εu=27.1%). The improved ductility was attributed to both the strain hardening induced by the coarse-grained structure and the extra strain hardening caused by the peculiar macroscopic network of ultrafine-grained structure. It was suggested that core grain size of approximately 1.2 µm and shell volume fraction of approximately 50–60% were the optimized harmonic structure design for austenite stainless steel.
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发表时间：
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影响因子：
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