Manipulating local heat accumulation towards controlled quality and microstructure of a Co-Cr-Mo alloy in powder bed fusion with electron beam
Manipulating local heat accumulation towards controlled quality and microstructure of a Co-Cr-Mo alloy in powder bed fusion with electron beam
复制标题
电子束粉末床熔合中控制局部热量积累以控制 Co-Cr-Mo 合金的质量和微观结构
DOI：
10.1016/j.matlet.2019.07.078
复制
发表时间：
2019
影响因子：
3
通讯作者：
Chiba Akihiko
中科院分区：
文献类型：
--
作者：
Zhao Yufan;Koizumi Yuichiro;Aoyagi Kenta;Yamanaka Kenta;Chiba Akihiko
控制成形质量和凝固微观结构是增材制造金属应用的关键问题。当采用电子束粉末床熔合制造 Co-28Cr-6Mo 合金时，考虑了通过线序孵化策略产生的局部热量积累。研究表明，通过削弱局部热量积累，可以轻松避免过热作为不均匀根源。熔池的瞬态几何形状和相关的温度梯度方向由局部热量积累决定，随后改变凝固微观结构。进行数值模拟是为了阐明所涉及的机制。
Controlled forming quality and solidification microstructure are crucial issues for the application of additive manufactured metal. The local heat accumulation through a line order hatching strategy was considered when a Co-28Cr-6Mo alloy was fabricated by powder bed fusion with electron beam. The study revealed that by weakening the local heat accumulation, overheating as a source of unevenness was easily avoided. Transient geometry of the molten pool and associated temperature gradient direction were determined by the local heat accumulation, which subsequently alters the solidification microstructure. The numerical simulations were performed to clarify the mechanisms involved.
影响因子：
1.8
作者：
Nomoto, Sukeharu;Minamoto, Satoshi;Nakajima, Keiji
通讯作者：
Nakajima, Keiji