Excellent mechanical and corrosion properties of austenitic stainless steel with a unique crystallographic lamellar microstructure via selective laser melting
Excellent mechanical and corrosion properties of austenitic stainless steel with a unique crystallographic lamellar microstructure via selective laser melting
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DOI：
10.1016/j.scriptamat.2018.09.017
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发表时间：
2019-01-15
影响因子：
6
通讯作者：
Nakano, Takayoshi
中科院分区：
文献类型：
--
作者：
Sun, Shi-Hai;Ishimoto, Takuya;Nakano, Takayoshi
我们首先通过选择性激光熔化技术在316L不锈钢试样中开发了一种独特的“晶体层状显微组织”（CLM），其中两个不同取向的晶粒交替出现。CLM是由主< 011 >晶粒和沿< 001 >沿着堆积方向排列的次晶粒组成的，它们分别源于熔池中部和侧部形成的垂直和约+/-45 °倾斜的柱状晶细胞。CLM的发展被发现通过产品的强化大大改善了材料性能，同时显示出比商业获得的试样更上级的耐腐蚀性。(C)2018 Acta Materialia Inc.爱思唯尔有限公司出版
We first developed a unique "crystallographic lamellar microstructure" (CLM), in which two differently oriented grains appear alternately, in a 316L stainless steel specimen via selective laser melting technology. The CLM was composed of major < 011 > grains and minor < 001 > grains aligned along the build direction, which stemmed from vertical and approximately +/- 45 degrees inclined columnar cells formed in the central and side parts of melt-pools, respectively. The development of CLM was found to largely improve the material properties via the strengthening of the product, simultaneously showing superior corrosion resistance to commercially obtained specimens. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.