Selective laser remelting of an additively manufactured Cu-Al-Ni-Mn shape-memory alloy
Selective laser remelting of an additively manufactured Cu-Al-Ni-Mn shape-memory alloy
复制标题
DOI：
10.1016/j.matdes.2018.05.010
复制
发表时间：
2018-09-05
影响因子：
8.4
通讯作者：
Pauly, Simon
中科院分区：
文献类型：
--
作者：
Gustmann, Tobias;Schwab, Holger;Pauly, Simon
采用选择性激光熔化（SLM）技术制备了81.95Cu-11.85Al-3.2Ni-3 Mn（wt%）形状记忆合金的完全马氏体（β '（1））样品。产生了具有约98.9 +/- 0.1%的高相对密度的无裂纹试样。在SLM过程中立即重熔已处理的层可提高相对密度（99.5 +/- 0.3%）。首先，通过改变再熔化步骤中的扫描速度，可以调节再熔化区的厚度。此外，重熔改变的微观结构以及相变温度，这往往会上升与体积能量输入。以这种方式，可以修改形状记忆性能，而不损害样品的相对密度和相当大的塑性。因此，重熔过程被证明是用于81.95Cu-11.85Al-3.2Ni-3 Mn和相关合金的有趣工具，以便在SLM处理期间优化和定制它们的性能，而不应用额外的后处理步骤。(C)2018爱思唯尔有限公司版权所有
Selective laser melting (SLM) was used to manufacture fully martensitic (beta'(1)) samples of the shape-memory alloy 81.95Cu-11.85Al-3.2Ni-3Mn (wt%). Crack-free specimens with a high relative density of about 98.9 +/- 0.1% were produced. Immediate remelting of already processed layers during SLM enhances the relative density (99.5 +/- 0.3%). Primarily by varying the scanning speed in the remelting step, the thickness of the remelted zone can be adjusted. Moreover, remelting alters the microstructure as well as the transformation temperatures, which tend to rise with the volumetric energy input. In this way, the shape-memory properties can be modified without compromising the relative density and the considerable plasticity of the samples. Thus, the remelting procedure proves to be an interesting tool for 81.95Cu-11.85Al-3.2Ni-3Mn and related alloys in order to optimize and tailor their performance already during SLM processing and without applying additional post-processing steps. (C) 2018 Elsevier Ltd. All rights reserved.