Role of aging time on the microstructure and shape memory properties of NiTiHfPd single crystals

ACAR, EMRE; Karaca, Haluk; Basaran, Burak; Yang, Fan; Mills, Michael; Noebe, Ronald; Chumlyakov, Yuri

doi:10.1016/j.msea.2013.02.016

Role of aging time on the microstructure and shape memory properties of NiTiHfPd single crystals

ACAR E., Karaca H., Basaran B., Yang F., Mills M., Noebe R., ...Daha Fazla

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, cilt.573, ss.161-165, 2013 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 573
Basım Tarihi: 2013
Doi Numarası: 10.1016/j.msea.2013.02.016
Dergi Adı: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.161-165
Anahtar Kelimeler: Aging, Elastic energy, NiTiHfPd, Single crystals, Shape memory alloy, MARTENSITIC-TRANSFORMATION, BEHAVIOR, DEPENDENCE, PARTICLES, ALLOY, AL
Erciyes Üniversitesi Adresli: Hayır

Özet

Shape memory properties of [111] oriented NiTiHfPd single crystals aged at 600 degrees C for 48 and 72 h were investigated through isobaric thermal cycling and superelasticity experiments in compression. A maximum transformation strain of 2.6% at 1000 MPa compressive stress was attained above 100 degrees C. It was observed that precipitate size and interparticle distances were strong functions of aging time and subsequently govern the shape memory responses of the NiTiHfPd single crystals. Moreover, it was revealed that the elastic energy storage highly depends on precipitate characteristics. (c) 2013 Elsevier B.V. All rights reserved.