Texture memory and strain-texture mapping in a NiTi shape memory alloy

Journal Article · Mon Aug 06 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2768899· OSTI ID:21016086

Ye, B; Majumdar, B S; Dutta, I ^[1]

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1. Materials Department, New Mexico Tech, 801 Leroy Place, Socorro, New Mexico 87801 (United States)

The authors report on the near-reversible strain hysteresis during thermal cycling of a polycrystalline NiTi shape memory alloy at a constant stress that is below the yield strength of the martensite. In situ neutron diffraction experiments are used to demonstrate that the strain hysteresis occurs due to a texture memory effect, where the martensite develops a texture when it is cooled under load from the austenite phase and is thereafter ''remembered.'' Further, the authors quantitatively relate the texture to the strain by developing a calculated strain-texture map or pole figure for the martensite phase, and indicate its applicability in other martensitic transformations.

• OSTI ID: 21016086
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 6 Vol. 91; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
BINARY ALLOY SYSTEMS
HEAT TREATMENTS
HYSTERESIS
MARTENSITE
NEUTRON DIFFRACTION
NICKEL ALLOYS
PHASE TRANSFORMATIONS
POLYCRYSTALS
RESIDUAL STRESSES
SHAPE MEMORY EFFECT
TEXTURE
THERMAL CYCLING
TITANIUM ALLOYS
YIELD STRENGTH