A novel training-free cast Fe-18Mn-5.5Si-9.5Cr-4Ni shape memory alloy with lathy delta ferrite

作者：Wen Y H^*; Peng H B; Sun P P; Liu G; Li N

来源：Scripta Materialia, 2010, 62(2): 55-58.

DOI：10.1016/j.scriptamat.2009.10.004

• Shape memory alloys
• Casting
• Martensitic phase transformation
• Delta ferrite
• Domain-specific manners

The microstructures and shape recovery of a cast Fe-18Mn-5.5Si-9.5Cr-4Ni alloy were investigated. We attained lathy ferrite in this cast alloy and a 94% recovery of 3.6% deformation only through annealing this alloy at 973 K. The subdivision of grains by lathy ferrite and its resulting formation of stress-induced martensite bands in a domain-specific manner accounted for the high shape recovery. This work provides a novel idea of developing training-free Fe-Mn-Si shape memory alloy with a high shape recovery.

• 出版日期2010-1
• 单位四川大学