Queensland Centre for Advanced Materials Processing and Manufacturing (AMPAM), School of Mechanical and Mining Engineering, The University of Queensland, Australia; Defence Materials Technology Centre, Australia.
J Mech Behav Biomed Mater. 2013 Dec;28:15-25. doi: 10.1016/j.jmbbm.2013.07.007. Epub 2013 Jul 20.
The influence of β phase stability on mechanical properties, deformation behaviours and phase composition were investigated for a series of Ti-24Nb-3Zr-2Sn-xMo alloys in response to hot and cold rolling. For the hot rolled alloys, the phase composition and deformation behaviours were largely consistent with those predicted on the basis of a Bo-Md plot and the Ms estimates. The deformation mechanisms involve growth and/or reorientation of plate-like martensite and/or twins. However, these are largely restricted in the cold rolled alloys due to the effects of grain refinement and residual stress. The cold rolled alloys exhibit the highest strengthening in combination with more limited ductility, which increased with increasing β phase stability. The moderately stable alloy, B, with e/a around 4.18 and Moeq∼10wt% gave the greatest strengthening in response to cold rolling, which was related to intense localised grain refinement.
研究了一系列 Ti-24Nb-3Zr-2Sn-xMo 合金在热和冷轧过程中β 相稳定性对力学性能、变形行为和相组成的影响。对于热轧合金，相组成和变形行为与基于 Bo-Md 图和 Ms 估计的预测基本一致。变形机制包括板条状马氏体的生长和/或重取向和/或孪晶。然而，由于晶粒细化和残余应力的影响，这些在冷轧合金中受到很大限制。冷轧合金表现出最高的强度结合有限的延展性，这随着β相稳定性的增加而增加。中等稳定的合金 B，e/a 约为 4.18，Moeq∼10wt%，在冷轧时表现出最大的强化效果，这与强烈的局部晶粒细化有关。
