Ti-5A1-2Mo-3Zr合金的低温形变

基金项目:

冶金工业部教育司理论研究基金资助项目

详细信息

Deformation Mechanisms of Ti-5Al-2Mo-3Zr Alloy at low Temperatures

摘要: 对Ti-523合金由室温到-75℃之间的拉伸性能和形变行为作了系统研究,发现淬火态在-75℃拉伸仍保持高塑性,而经回火的试样则塑性较低。两者的强度在低温下均升高,可比室温强度高10%。形变机理则由室温的滑移为主变为低温下的以孪生为主,交替温度可能在-15℃~-30℃之间。低温形变出现一种双重"三孪晶"的取向关系,可能表示形变中各晶块间有很大的相对转动。
- 钦合金 /
- 低温形变 /
- 孪晶
Abstract: This paper is to investigate the mechanical properties and deformation mechanisms at low temperatures of Ti-5AI-2Mo-3Zr alloy. The results showed that quenched samples kept theit high plasticity until -75℃.while the tempered samples were with very low elongation.This means that alloying zirconium is beneficial to low temperature plasticity only when it is at solution state, but not at precipitation state.The deformation mechanism changed from slip to twin during testing temperature lowering.TEM observation showed a special morphology of double "triple twins",may indicating that the crystals rotated from each other a rather large angle during low temperature deformation.
- titanium alloy /
- low temperature deformation /
- twin