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Research on elevated temperature deformation behavior of Ti-6Al-4V sheets

Rare Metals 2009年第6期28卷 550-553页

作者： sun shengdi guo bin shan debin zhong yingying School of Materials Science ＆ Engineering Harbin Institute of Technology Harbin 150001 China

Hot deformation behaviors were studied by means of scanning electron microscopy （SEM） and uniaxial thermal tension. The effect of deformation temperature and strain rate on flow stress was evaluated, and deformation mechanism was analyzed. The results show that the stress-strain curves of Ti-6Al-4V （TC4） alloy sheet and TC4 alloy bar at elevated temperatures have different forms and rules. Flow stress of TC4 is controlled by both strain rate and deformation temperature. The flow stress decreases with the increase of high temperature. Deformation mechanisms exhibit dynamic recovery and recrystallization feature within high temperature region and grain boundary slip behaviors at low temperature.

关键词： titanium alloys hot tension strain rate deformation temperature

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Deep Drawing of Titanium Alloy TC4 Sheet at Hot Temperatures

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Journal of Wuhan University of Technology(Materials Science) 2009年第S1期24卷 128-131页

作者：郭斌孙圣迪 School of Materials Science & Engineering Harbin Institute of Technology

The true strain-stress curves of TC4 titanium sheet were obtained by uniaxial tensile tests under different experimental conditions,and the effects of forming temperature and strain speed on the rheological stress and hot deforming capacity were *** Forming experience for titanium alloy TC4 sheet with 1mm thickness was executed to investigate the hot forming technology of Thin-walled cylindrical cup of titanium *** results showed that the softening mechanism was dynamic re-crystallization,flow curves of the TC4 alloy were characterized by a linear increase until regular single peak after which flow softening was *** the flow stress decreased with increasing temperature and decreasing strain *** the forming temperature increased,the limit drawing coefficient would decreased first and then increased,there would be a minimum 0.461 when the temperature was 770 ℃,springback would be becoming smaller,but phenomenon of lug do not Significant improvement.

关键词： TC4 flow stress deep drawing

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