Deformation of Biomedical AuCuAl-Based Shape Memory Alloy Micropillars. (6th March 2017)

• Record Type: Journal Article
• Authors: Umise, Akira; Serizawa, Rui; Yanagida, Sari; Goto, Kenji; Tahara, Masaki; Chang, Tso Fu Mark; Inamura, Tomonari; Sone, Masato; Hosoda, Hideki
• Is Part Of: MRS advances. Volume 2:Number 26(2017)
• Page Start: 1411
• Page End: 1415
• Publication Date: 2017-03-06
• Subjects: phase transformation, -- biomaterial, -- Au; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2017.244
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: The deformation behavior and shape recovery of an Fe-added AuCuAl shape memory alloy micropillar were investigated. XRD analysis revealed that Au-28Cu-22Al-2Fe (at.%) alloy contained a second phase which was evaluated to be α-Fe (bcc). SEM observation also confirmed the second phase at the surface of the micropillar specimen. A polycrystalline micropillar with 20 x 20 x 40μm rectangular was fabricated by a focused ion beam (FIB) system, and micro compress test was performed at room temperature. It was found that the yield stress of micropillar showed 50MPa, which must correspond to stress for inducing martensite. After the heating of the compressed micropillar, 1.75% shape recovery was recognized which is comparable to the transformation strain. Then, the Fe-added AuCuAl micropillar was concluded to possess good shape memory property, and thus this alloy may be suitable for small endovascular treatment which requires good X-ray radiography.