Excellent tension properties of stainless steel with a 316L/17-4PH/17-4PH laminated structure fabricated through laser additive manufacturing
Excellent tension properties of stainless steel with a 316L/17-4PH/17-4PH laminated structure fabricated through laser additive manufacturing
复制标题
通过激光增材制造制造的 316L/17-4PH/17-4PH 层压结构具有优异的不锈钢拉伸性能
DOI：
10.1016/j.msea.2021.142461
复制
发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
宋立军
中科院分区：
文献类型：
--
作者：
许康;李博川;李思萌;陈荣华;高兴轲;刘承欢;姜潮;宋立军
层压金属结构（LMS）是一种具有特定部位特性的金属，具有很大的实际应用潜力。本研究采用激光增材制造（AM）技术制备了具有316L/17-4PH/17-4 PH交替层压结构的不锈钢。根据光学显微镜和背散射电子图像，在LMS中观察到两个不同的区域，即奥氏体区（AU）和马氏体区（MA）。在电子背散射衍射图像中，AU区可分为奥氏体层和混合层，MA区为马氏体层。由于增材制造工艺的原因，三层之间存在显微硬度和化学成分的不均匀性，导致各层的奥氏体稳定性不同。拉伸试验结果表明，在相同的打印工艺参数下，增材制造的纯316L结构具有更强的极限强度和更大的延伸率，具有良好的强度-延展性协同效应。在拉伸试验过程中，层合结构引起应变分配，应变分配随外加应变的变化而变化，并延迟应变局部化过程。由于与纯AM 316L相比奥氏体稳定性的改变，相变诱发塑性效应（TRIP）相继触发，层压结构将TRIP效应扩展到大塑性应变。因此，本研究验证了在LMS不锈钢上使用AM设计的潜力，并可能为重新探索LMS材料和组件提供一个框架。
Laminated metal structures (LMS), which are metals with site-specific properties, exhibit great potential for practical applications. In this study, a stainless steel with a laminated structure of alternating 316L/17-4PH/17-4 PH layer is fabricated using a laser additive manufacturing (AM) technique. Heterogeneous structures in the LMS are observed in two distinct areas, the austenite area (AU) and the martensite area (MA), based on optical microscopy and backscattered electron images. In the electron backscattered diffraction images, the AU area can be divided into austenite and mixture layers, while the MA area represents the martensite layer. Owing to the AM fabrication process, heterogeneity of both the micro-hardness and chemical composition exists among the three layers, which leads to different austenite stabilities in each layer. The tension test results reveal an excellent strength-ductility synergy with stronger ultimate strength and larger elongation than the pure 316L structure produced by AM with the same printing process parameters. During tension testing, the laminated structure causes strain partitioning, which evolves with the applied strain and delays the strain localization process. Owing to the change in austenite stability compared with pure AM 316L, the transformation-induced plasticity effect (TRIP) is triggered successively, and the laminate structure extends the TRIP effect to large plastic strains. As a result, the present study verifies the potential of using AM design for LMS stainless steel and may offer a framework for re-exploring LMS materials and components.
登录
查看更多内容
DOI：
10.1080/14786445108561060
发表时间：
1951-04
期刊：
Philosophical Magazine Series 1
影响因子：
--
作者：
J. D. Eshelby;F. Frank;F. Nabarro
通讯作者：
J. D. Eshelby;F. Frank;F. Nabarro
影响因子：
9.8
作者：
Li, Zan;Voisin, Thomas;Wang, Y. Morris
通讯作者：
Wang, Y. Morris
DOI：
10.1016/j.msea.2004.01.048
发表时间：
2004-06
影响因子：
6.4
作者：
Nobuo Nakada;J. Syarif;T. Tsuchiyama;S. Takaki
通讯作者：
Nobuo Nakada;J. Syarif;T. Tsuchiyama;S. Takaki
影响因子：
16.1
作者：
D. Lesuer;C. Syn;O. Sherby;J. Wadsworth;J. Lewandowski;W. Hunt
通讯作者：
D. Lesuer;C. Syn;O. Sherby;J. Wadsworth;J. Lewandowski;W. Hunt
影响因子：
6
作者：
Hu-Lin Liu;B. Zhang;Guang-Ping Zhang
通讯作者：
Hu-Lin Liu;B. Zhang;Guang-Ping Zhang