Details

Autor(en) / Beteiligte

• Wang, Haizhen
• Yi, Xiaoyang
• Zhu, Yingying
• Sun, Sibo
• Gao, Yuan
• Cai, Wei
• Gao, Zhiyong

Titel

Effects of proton irradiation on the microstructure and shape recovery characteristics of a NiTi alloy

Ist Teil von

• Materials characterization, 2018-06, Vol.140, p.122-128

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Herein, we investigate the effects of proton irradiation on the structure and shape recovery characteristics of a NiTi alloy and provide a mechanistic explanation of the observed phenomena. Detailed analysis revealed that bombardment with 3 MeV protons induced the formation of a complex multilayer structure comprising TiH2, Ti2Ni, austenite and austenite-martensite layers along the irradiation direction with increasing distance and the origin of the above structure was shown to be closely related to the preferential sputtering effect and irradiation-induced segregation. Finally, the shape recovery characteristics significantly deteriorated with increasing irradiation fluence, since the multilayer structure hindered the martensitic transformation. •The complex multilayer structure can be induced by irradiation.•Phase constitution with increased fluence evolved as follows: B19’ → (B19’ + B2 + Ti2Ni) → (B2 + Ti2Ni + TiH2).•The transformation temperature decreases remarkablly with the increasing of irradiation fluence.•The strain recovery characteristics deteriorated significantly with the irradiation fluence increasing.