ISIJ International ( IF 1.8 ) Pub Date : 2020-08-18 , DOI: 10.2355/isijinternational.isijint-2019-744 Takuya Ishimoto 1, 2 , Siqi Wu 1 , Yukinobu Ito 1 , Shi-Hai Sun 1, 2 , Hiroki Amano 1, 3 , Takayoshi Nakano 1, 2
In recent years, additive manufacturing has attracted attention as a technology that enables control of the crystallographic texture of metallic materials. We achieved successful control of the crystallographic texture of 316L austenitic stainless steel using selective laser melting (SLM). Three distinguished textures were achieved by changing the laser scan speed, namely: the single crystalline-like texture with {001} orientation in the build direction, the crystallographic lamellar texture in which two kinds of grains with {011} and {001} orientations in the build direction are alternately stacked, and polycrystalline with relatively random orientation. The melt pool shape and the solidification behavior (thermal gradient and migration velocity of solid/liquid interface) in a melt pool could be important controlling factors for the evolution of the crystallographic texture under the SLM process.
Fullsize Image中文翻译:
选择性激光熔化控制316L奥氏体不锈钢的晶体学取向
近年来,增材制造作为一种能够控制金属材料的晶体织构的技术引起了人们的关注。我们使用选择性激光熔化(SLM)成功控制了316L奥氏体不锈钢的晶体组织。通过改变激光扫描速度获得了三种杰出的纹理,即:在构建方向上具有{001}取向的单晶状纹理,在晶体层状纹理中,两种晶粒具有{011}和{001}取向。构建方向交替堆叠,并且具有相对随机取向的多晶。
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