期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.05.046
关键词
Inconel 718; Grain structure; Selective electron beam melting; Simulation
类别
资金
- Deutsche Forschungsgemeinschaft (DFG) through the Collaborative Research Center [SFB/Transregio 103, SFB 814]
Selective electron beam melting (SEBM) is an additive manufacturing method where complex parts are built from metal powders in layers of typically 50 gm. An electron beam is used for heating (about 900 degrees C building temperature) and selective melting of the material. The grain structure evolution is a result of the complex thermal and hydrodynamic conditions in the melt pool. We show how different scanning strategies can be used to produce either a columnar grain structure with a high texture in building direction or an equiaxed fine grained structure. Numerical simulations of the selective melting process are applied to study the fundamental mechanisms responsible for differing grain structures. It is shown, that the direction of the thermal gradient during solidification can be altered by scanning strategies to acquire either epitaxial growth or stray grains. We show that it is possible to locally alter the grain structure of a part, thus allowing tailoring of the mechanical properties. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据