High Cycle Fatigue Properties of Ti-834 Following Prolonged Thermal Exposure in air
The effect of surface finish has been studied on the high cycle fatigue endurance limit of a near-alpha titanium alloy IMI 834. Following exposure in air at 650℃ for durations up to 1500 hrs.both shot peened and machined specimens were tested using a staircase loading method at R=0. 1 to measure the 107 plain fatigue endurance limit. The fatigue limits for both the shot peened and machined conditions were similar for unexposed specimens. Thermal exposure at 650℃ in air however, led to an increase in the fatigue limit for machined specimens, and a lowering of the fatigue limit in the case of shot peened specimens. Surface microcracks within the specimen gauge were observed to form more readily in the shot peened material. The increased propensity for surface crack initiation in peened specimens following thermal exposure in air is ascribed to the accelerated diffusion of interstitial oxygen within the cold-worked surface region.
Shot peening alpha-case thermal exposure silicides Ti-834 high cycle fatigue testing
Meurig Thomas Trevor Lindley Dave Rugg Martin Jackson
Advanced Manufacturing Research Centre with Boeing,Rotherham S60 5TZ,UK Department of Materials,Imperial College London,London SW7 2AZ,UK Rolls-Royce plc,Moor Lane,Derby DE24 8BJ,UK Department of Materials Science and Engineering,The University of She f field,Sheffield S1 3JD,UK
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1872-1876
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）