Deformation Mechanisms and Fatigue Crack Initiation in β Titanium Alloys in Relation with Microstructure
This paper focus on monotonic tensile and low cycle fatigue properties at 20°C of two,different β metastable alloys (Ti-5553 and Til7).. Deformation mechanisms and crack initiation processes have been investigated at different scales:by scanning electron microscopy to characterize slip activity in slip bands and/or at lamellae/matrix interfaces and also by optical microscopy at lower magnification to consider the ex-(3 grains. A special attention has been paid on this last scale by performing specific mechanical instrumented tests to quantify the in and out of plane strain fields by speckle measurement approach and optical interferometric microscopy respectively. The heterogeneities of deformation and damage processes will be discussed taking into account these different scales. This work has been developed in the framework of the PROMITI project (multi-scale approach of the PROperties and of the Microstructure of Tl-alloys) financially supported by the French national Research Foundation for Aeronautics and Space (FRAE).
βtitanium alloys monotonic tensile yin and out of plane strain fields crack initiation site
Timothee Duval Patrick Villechaise Sandra Andrieu
Institut P -ENSMA Universite de Poitiers-Futuroscope Chasseneuil 86961 , France Messier Bugatti Dow Institut P -ENSMA Universite de Poitiers-Futuroscope Chasseneuil 86961 , France Messier Bugatti Dowty-SAFRAN group,Bidos 64401,France
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
896-900
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）