材料科学
形状记忆合金
同步加速器
马氏体
融合
合金
原位
衍射
相(物质)
同步辐射
X射线
X射线晶体学
激光器
结晶学
复合材料
冶金
光学
微观结构
化学
物理
有机化学
语言学
哲学
作者
Jiajia Shen,Zhi Zeng,Mohammadreza Nematollahi,Norbert Schell,Emad Maawad,R. N. Vasin,Keyvan Safaei,Behrang Poorganji,Mohammad Elahinia,J.P. Oliveira
标识
DOI:10.1016/j.addlet.2021.100003
摘要
a b s t r a c t High temperature shape memory alloys of the Ni-Ti-Hf system are potential candidates for aerospace applications where powder bed additive manufacturing technologies are being increasingly used.In this work, a Ti-rich NiTiHf high temperature shape memory alloy powder was processed by laser powder bed fusion.The standard heat treatment of 550 0 C for 3 hours was imposed to promote H-phase precipitation.At room temperature, the material has a dual-phase microstructure composed of martensite, the matrix, and H-phase, as a strengthening precipitate.High energy synchrotron X-ray diffraction is used to evaluate, in-situ, the elastic behaviour of the fabricated part.The deformation anisotropy of several (h k l) families of planes of both phases is evidenced.No major texture changes were observed upon macroscopic elastic loading.We illustrate the potential of using high energy synchrotron X-ray diffraction for detailed analyses of minority phases in additively manufactured components.
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