Effect of the surface state of the Ti-Ni alloy products on the shape memory effect parameters

被引：0

作者：

Prokoshkin S.D. ^{[1
]}

Ryklina E.P. ^{[1
]}

Chernavina A.A. ^{[1
]}

Abramov V.Y. ^{[2
]}

Krestnikov N.S. ^{[2
]}

机构：

[1] National University of Science and Technology MISIS, Moscow

[2] Energy Engineering Research Institute (NIKIET), Moscow

来源：

Russ. Metall. (Metally) | 2009年 / 6卷 / 519-526期

关键词：

Temperature - Titanium alloys - Shape memory effect - Thermomechanical treatment - Titanium oxides - Binary alloys;

D O I：

10.1134/S003602950906010X

中图分类号：

学科分类号：

摘要：

The depth profiles of the structure, composition, and properties of the oxide layer that forms on the surface of Ti-Ni alloy products during postdeformation annealing (PDA) are studied. These parameters depend substantially on the holding temperature and time during PDA. The application of low-temperature thermomechanical treatment improves the state of surface as compared to quenching due to a decrease in the oxide-layer depth by more than an order of magnitude. The state of the surface of Ti-Ni alloy products significantly affects the characteristic martensite transformation temperatures and the shape memory effect parameters. This effect is more pronounced as the sample thickness (diameter) decreases. It is impossible to predict this effect on the entire set of the functional properties of the alloy products because of its ambiguity. Therefore, the oxide layer should be removed by etching to obtain reliable and reproducible results. © 2009 Pleiades Publishing, Ltd.

引用

页码：519 / 526

页数：7