Simulation on Pipe Joints Expansion Technology of NiTiNb Shape Memory Alloy
In order to study the low-temperature expansion process of NiTiNb shape memory alloy, this paper makes use of numerical simulation method to complete the simulations and analysis. The shape memory effect of NiTiNb alloy pipe joints under different expansion temperatures and expansion strains have been compared and evaluated. Through simulations of low-temperature expansion and elevated temperature shape recovery of NiTiNb alloy pipe joints, the relationships between elastic deformation, phase transformation deformation and recovery ratio under different expansion temperatures and expansion strains have been acquired. The results show that the highest expansion strain should below 11%, in consideration of recovery ratio and recovery temperature, the optimal expansion temperature range is -60~-50°C .
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
G. L. Yang et al., "Simulation on Pipe Joints Expansion Technology of NiTiNb Shape Memory Alloy", Advanced Materials Research, Vols. 189-193, pp. 1711-1717, 2011