TY - JOUR
T1 - Effect of Zr on the martensitic transformation and the shape memory effect in Ti-Zr-Nb-Ta high-temperature shape memory alloys
AU - Wang, Jun
AU - Li, Qiquan
AU - Xiong, Chengyang
AU - Li, Yan
AU - Sun, Baohui
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/3/15
Y1 - 2018/3/15
N2 - The microstructures, phase transformations, mechanical properties and shape memory effect of Ti-xZr-10Nb-4Ta (x = 16, 18, 19 and 19.5 at. %) alloys were investigated. The X-ray diffraction and transmission electron microscopy results showed that the Ti-16Zr-10Nb-4Ta alloy is composed of single αʺ-martensite, while the others consisted of predominant orthorhombic αʺ-martensite phase and a small amount of the β phase. The reverse martensitic transformation starting temperature (As) was 477 K for the Ti-16Zr-10Nb-4Ta alloy and decreased non-linearly with increasing Zr content. The addition of Zr resulted in the appearance of the β phase, thus elevating the stress for martensite re-orientation. However, it weakened the plasticity and the shape memory effect. The highest shape memory strain and the largest tensile strain in Ti-16Zr-10Nb-4Ta alloy were found to be 4% and 16%, respectively.
AB - The microstructures, phase transformations, mechanical properties and shape memory effect of Ti-xZr-10Nb-4Ta (x = 16, 18, 19 and 19.5 at. %) alloys were investigated. The X-ray diffraction and transmission electron microscopy results showed that the Ti-16Zr-10Nb-4Ta alloy is composed of single αʺ-martensite, while the others consisted of predominant orthorhombic αʺ-martensite phase and a small amount of the β phase. The reverse martensitic transformation starting temperature (As) was 477 K for the Ti-16Zr-10Nb-4Ta alloy and decreased non-linearly with increasing Zr content. The addition of Zr resulted in the appearance of the β phase, thus elevating the stress for martensite re-orientation. However, it weakened the plasticity and the shape memory effect. The highest shape memory strain and the largest tensile strain in Ti-16Zr-10Nb-4Ta alloy were found to be 4% and 16%, respectively.
KW - Martensitic transformation
KW - Mechanical properties
KW - Shape memory alloy
KW - Ti-Zr
UR - http://www.scopus.com/inward/record.url?scp=85038071718&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2017.12.003
DO - 10.1016/j.jallcom.2017.12.003
M3 - 文章
AN - SCOPUS:85038071718
SN - 0925-8388
VL - 737
SP - 672
EP - 677
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -