作者
Dunyong Deng, Johan Moverare, Ru Lin Peng, Hans Söderberg
发表日期
2017/5/2
期刊
Materials Science and Engineering: A
卷号
693
页码范围
151-163
出版商
Elsevier
简介
Materials manufactured with electron beam melting (EBM) have different microstructures and properties to those manufactured using conventional manufacturing methods. A detailed study of the microstructures and mechanical properties of Inconel 718 manufactured with EBM was performed in both as-manufactured and heat-treated conditions. Different scanning strategies resulted in different microstructures: contour scanning led to heterogeneous grain morphologies and weak texture, while hatch scanning resulted in predominantly columnar grains and strong< 001>//building direction texture. Precipitates in the as-manufactured condition included γ′, γ ″, δ, TiN and NbC, among which considerable amounts of γ ″yielded relatively high hardness and strength. Strong texture, directionally aligned pores and columnar grains can lead to anisotropic mechanical properties when loaded in different directions. Heat …
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