Effects of the substitution of gallium with boron on the physical and mechanical properties of Ni-Mn-Ga shape memory alloys


AYDOĞDU Y. , Turabi A. S. , KÖK M., AYDOĞDU A. , Tobe H., Karaca H. E.

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, vol.117, no.4, pp.2073-2078, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 117 Issue: 4
  • Publication Date: 2014
  • Doi Number: 10.1007/s00339-014-8621-y
  • Title of Journal : APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
  • Page Numbers: pp.2073-2078

Abstract

The effects of the substitution of gallium with boron on the physical, mechanical and magnetic shape memory properties of Ni51Mn28.5Ga20.5-xBx (at.%) (x = 0, 1, 2, 3) polycrystalline alloys are investigated. It has been found that transformation temperatures are decreasing while hardness is increasing with boron addition. B-doping of NiMnGa alloys results in the formation of a second phase that increases its ductility and strength in compression. Moreover, saturation magnetization of austenite is decreasing, while Curie temperature of austenite is increasing with B-doping.