Advances in Low Temperature (<0. 25Tm) Creep Deformation Mechanisms of α,α+β,and β Titanium Alloys
It is known that some titanium alloys such as α+p Ti-6A1-4V can creep at low temperatures (<0. 25Tm). Recent work by the authors and co-workers on various α,α+β,and β Ti-V and TiMn alloys has shown that a number of factors influence creep deformation of these alloys. The mi-crostructural parameters that affect low-temperature creep deformation in the single-phase α alloys are related to grain size. In single-phase p alloys, in addition to grain size,the stability of the β phase also has an effect. In the two-phase α+β alloys, the parameters affecting creep deformation include phase morphology and stability of the β phase. In singlephase α and β titanium alloys, the major deformation mechanisms are slip and time-dependent twinning. In the two-phase α+β titanium alloys, the deformation mechanisms included slip and twinning in the α phase, inter-phase interface sliding,and stressinduced martensite in the β phase. These results show the effect of microstructure on creep deformation at high temperature (>0. 4Tm) cannot be applied to low-temperature creep. The results and ramifications of the findings in the design and selection of titanium alloys will be presented. This work is being supported by the NSF under grant number DMR-0906994.
Titanium (Ti) alloys low temperature creep microstructure transmission electron microscopy (TEM) plastic deformation
Zane W. Wyatt Sreeramamurthy Ankem
Department of Materials Science & Engineering University of Maryland-College Park ,College Park ,MD 20742 USA
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
862-866
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）