Formability of Annealed Ni-Ti Shape Memory Alloy Sheet

作者：Kuang-Jau Fann, Jyun-Yang Su, Chuan‐Ming Chang · 发表于：IOP Conference Series Materials Science and Engineering · 年份：2018 · DOI：10.1088/1757-899x/324/1/012038 · 被引用次数：3 · 研究领域：Shape Memory Alloy Transformations、Titanium Alloys Microstructure and Properties、Magnetic and transport properties of perovskites and related materials

Ni-Ti shape memory alloy has two specific properties, superelasiticity and shape memory effect, and thus is widely applied in diverse industries.To extend its application, this study attempts to investigate the strength and cold formability of its sheet blank, which is annealed at various temperatures, by hardness test and by Erichsen-like cupping test.As a result, the higher the annealing temperature, the lower the hardness, the lower the maximum punch load as the sheet blank fractured, and the lower the Erichsen-like index or the lower the formability.In general, the Ni-Ti sheet after annealing has an Erichsen-like index between 8 mm and 9 mm.This study has also confirmed via DSC that the Ni-Ti shape memory alloy possesses the austenitic phase and shows the superelasticity at room temperature.