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Title: Influence of boron on the microstructural and mechanical properties of Ni{sub 53.5}Mn{sub 26.0}Ga{sub 20.5} shape memory alloy

Boron addition to Ni{sub 53.5}Mn{sub 26.0}Ga{sub 20.5} alloy is found to modify the microstructure and mechanical properties substantially. Studies on (Ni{sub 53.5}Mn{sub 26.0}Ga{sub 20.5})B{sub x} alloys reveal that boron addition causes grain refinement which led to an increase in compressive strength in x=0.5 alloy which also retained multimode twinning. Substantial second phase segregation rich in Ni was seen at grain boundaries, the extent of which increased with boron content. This led to a compositional shift in the matrix phase which resulted in a reduction in the martensitic transformation temperature and which in turn caused an easy deformation at low stresses and suppression of multimode twinning in x=1.0 alloy.
Authors:
; ;  [1] ;  [2]
  1. School of Physics, University of Hyderabad, Central University P. O., Hyderabad - 500 046 (India)
  2. Department of Physics, Rajiv Gandhi University of Knowledge Technologies, IIIT-Campus, Gachibowli, Hyderabad - 500 032 (India)
Publication Date:
OSTI Identifier:
22269375
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BORON; BORON ADDITIONS; COMPRESSION STRENGTH; DEFORMATION; GRAIN BOUNDARIES; GRAIN REFINEMENT; PHASE TRANSFORMATIONS; SHAPE MEMORY EFFECT; STRESSES