Transformation behavior in NiTi-20Hf shape memory alloys - Transformation temperatures and hardness

被引：36

作者：

Benafan, O. ^{[1
]}

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

Scheiman, D. A. ^{[2
]}

机构：

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

[2] Ohio Aerosp Inst, Cleveland, OH 44142 USA

来源：

SCRIPTA MATERIALIA | 2018年 / 146卷

关键词：

Shape memory alloys; NiTiHf; Martensitic phase transformation; Precipitates; Actuators;

D O I：

10.1016/j.scriptamat.2017.11.050

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A series of NiTi-20Hf high-temperature shape memory alloys with varying nickel content from 50 to 51% were subjected to solution and aging heat treatments, thermal cycling, and hardness testing. Transformation temperatures for all conditions were measured and found to decrease as a function of increasing Ni content up to 50.5%. There was a gradual increase or consistent temperature for Ni contents above 50.5%, depending on the aged or homogenized condition. A similar trend was observed in the hardness values. The alloys aged at 550 degrees C for 3 h exhibited the highest hardness with an even greater increase at Ni contents above 50.5%. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：251 / 254

页数：4

共 12 条

[1]

[Anonymous], J PHYS 4

[2] Mechanical and functional behavior of a Ni-rich Ni50.3Ti29.7Hf20 high temperature shape memory alloy [J].

Benafan, O. ;

Garg, A. ;

Noebe, R. D. ;

Bigelow, G. S. ;

Padula, S. A., II ;

Gaydosh, D. J. ;

Schell, N. ;

Mabe, J. H. ;

Vaidyanathan, R. .

INTERMETALLICS, 2014, 50 :94-107

[3] Microstructural Response During Isothermal and Isobaric Loading of a Precipitation-Strengthened Ni-29.7Ti-20Hf High-Temperature Shape Memory Alloy [J].

Benafan, O. ;

Noebe, R. D. ;

Padula, S. A., II ;

Vaidyanathan, R. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2012, 43A (12) :4539-4552

[4]

Benafan O., 2017, P INT C SHAP MEM SUP, P1

[5] Ni-Ti-Hf shape memory alloy: effect of aging and thermal cycling [J].

Besseghini, S ;

Villa, E ;

Tuissi, A .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 273 :390-394

[6] Load-biased shape-memory and superelastic properties of a precipitation strengthened high-temperature Ni50.3Ti29.7Hf20 alloy [J].

Bigelow, G. S. ;

Garg, A. ;

Padula, S. A., II ;

Gaydosh, D. J. ;

Noebe, R. D. .

SCRIPTA MATERIALIA, 2011, 64 (08) :725-728

[7] Influence of Ni on martensitic phase transformations in NiTi shape memory alloys [J].

Frenzel, J. ;

George, E. P. ;

Dlouhy, A. ;

Somsen, Ch. ;

Wagner, M. F. -X. ;

Eggeler, G. .

ACTA MATERIALIA, 2010, 58 (09) :3444-3458

[8] Effects of nanoprecipitation on the shape memory and material properties of an Ni-rich NiTiHf high temperature shape memory alloy [J].

Karaca, H. E. ;

Saghaian, S. M. ;

Ded, G. ;

Tobe, H. ;

Basaran, B. ;

Maier, H. J. ;

Noebe, R. D. ;

Chumlyakov, Y. I. .

ACTA MATERIALIA, 2013, 61 (19) :7422-7431

[9] Effects of Ni content on the shape memory properties and microstructure of Ni-rich NiTi-20Hf alloys [J].

Saghaian, S. M. ;

Karaca, H. E. ;

Tobe, H. ;

Pons, J. ;

Santamarta, R. ;

Chumlyakov, Y. I. ;

Noebe, R. D. .

SMART MATERIALS AND STRUCTURES, 2016, 25 (09)

[10]

Sczerzenie F., 2004, P INT C SHAP MEM SUP, P203

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