Viable low temperature shape memory alloys based on Ni-Ti-Hf formulations

被引：29

作者：

Benafan, O. ^{[1
]}

Bigelow, G. S. ^{[1
]}

Garg, A. ^{[1
,2
]}

Noebe, R. D. ^{[1
]}

机构：

[1] NASA, Glenn Res Ctr, Mat & Struct Div, Cleveland, OH 44135 USA

[2] Univ Toledo, 2801 W Bancroft St, Toledo, OH 43606 USA

来源：

SCRIPTA MATERIALIA | 2019年 / 164卷

关键词：

Low temperature shape memory alloys; NiTiHf; Actuators; LTSMA; H-phase; TRANSFORMATION TEMPERATURES; MARTENSITIC-TRANSFORMATION; FUNCTIONAL-PROPERTIES; BEHAVIOR; PHASE; SUPERELASTICITY; HYSTERESIS; STRAINS;

D O I：

10.1016/j.scriptamat.2019.01.019

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ni-rich NiTiHf alloys with Hf content from 1 to 12.5 at.% were evaluated for their potential as low temperature shape memory alloys. At 51 at.% Ni, a minimum in transformation temperature was observed at 8 at.% Hf with a martensite finish temperature of -140 degrees C. Beyond 8 at.% Hf, transformation temperatures started to rise. Increasing Ni content from 503 to 52 at.% resulted in a resilient alloy with remarkable dimensional stability and transformation strain in the range of 3% in compression. Work outputs above 30 J/cm(3) in some of these alloys attest to their suitability for low temperature actuator applications. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：115 / 120

页数：6