Grain refinement of a rapidly solidified Ti-30Ni-20Cu alloy by two-step annealing

作者：Kim Min soo; Cho Gyu bong; Noh Jung pil; Jeon Young min; Kim Yeon wook; Miyazaki Shuichi; Nam Tae hyun^*

来源：Scripta Materialia, 2010, 63(10): 1001-1004.

DOI：10.1016/j.scriptamat.2010.07.033

• Shape memory alloys
• Grain refining
• Crystallization
• Melt spinning

Ti-30Ni-20Cu (at.%) alloy ribbons with an average grain size of 0.25-0.28 mu m were obtained by applying two-step annealing, comprising a first annealing step at 773-823 K and a second annealing step at 748 K, to amorphous melt-spun ribbons, which was very small compared with ribbons obtained by one-step annealing at 748-823 K (0.64-1.20 mu m). Hysteresis and elongation associated with the B2-B19 transformation were decreased by two-step annealing, while the fracture stress and strain increased.

• 出版日期2010-11