Study on microstructure and properties of a Ti-10V-10Al novel lightweight shape memory alloy prepared by selective laser melting

Authors:
  • JQJintao Que
    Jintao Que
  • JLJun Li
    Jun Li
  • YGYuqi Gao
    Yuqi Gao
  • YTYinbao Tian
    Yinbao Tian
  • XZXin Zhang
    Xin Zhang
  • BCBo Cui
    Bo Cui
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Abstract
Shape memory alloys (SMAs) are widely applied in various fields due to their superior shape memory effect (SME) and superelasticity. However, most SMAs show unsatisfactory shape memory performance in a high-temperature environment due to their low phase transition temperatures. As a result, elevating the phase transition temperature of SMAs is essential. Among all kinds of SMAs, Ti-V-Al-based shape memory alloys have prominent advantages, including high phase transition temperatures and lightweight. In this study, a novel Ti-10V-10Al high-temperature lightweight shape memory alloy (HTSMA) was fabricated using a selective laser melting (SLM) method. The investigation results indicate that the Ti-10V-10Al has superior tensile properties, with a tensile strength of 1107.4 MPa and an elongation of 9.3%, exceeding many reported Ti-based SMAs. More importantly, the alloy achieves a shape recovery rate of 98% at a 5% pre-strain, indicating its excellent shape memory effect. This research provides a new insight for designing a high-performance SLM Ti-V-Al HTSMAs.

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