Constant-Strain Thermal Cycling of a Ni50.3Ti29.7Hf20 High-Temperature Shape Memory Alloy

被引：14

作者：

Benafan O. ^{[1
]}

Noebe R.D. ^{[1
]}

Halsmer T.J. ^{[1
,2
]}

Padula S.A., II ^{[1
]}

Bigelow G.S. ^{[1
]}

Gaydosh D.J. ^{[1
,3
]}

Garg A. ^{[1
,4
]}

机构：

[1] Materials and Structures Division, NASA Glenn Research Center, Cleveland, 44135, OH

[2] Jacobs Technology, Cleveland, 44142, OH

[3] Ohio Aerospace Institute, Cleveland, 44142, OH

[4] University of Toledo, Toledo, 43606, OH

来源：

Shape Memory and Superelasticity | 2016年 / 2卷 / 02期

关键词：

Constant-strain; High-temperature shape memory alloy; NiTiHf; Recovery stress; Training;

D O I：

10.1007/s40830-016-0068-x

中图分类号：

学科分类号：

摘要：

The effect of various pre-straining routines on the recovery stresses of a Ni-rich Ni50.3Ti29.7Hf20 high-temperature shape memory alloy was investigated in tension and compression. The recovery stresses, obtained by means of constant-strain thermal cycling, were evaluated after isothermal (up to ±2 % applied strain at room temperature) or after isobaric thermal cycling at stress levels between ±100 and 400 MPa. The material exhibited high force generation capability with recovery stresses of nearly 1.5 GPa on the first cycle under particular pre-strain conditions. The recovery stresses are shown to decay during subsequent cycles using an upper cycle temperature of 300 °C with a saturated stress level nearing 1.1 GPa in compression. © 2016, ASM International.

引用

页码：218 / 227

页数：9

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