Deformation behavior of TC1 titanium alloy sheet under double-sided pressure

来源期刊：中国有色金属学报(英文版)2008年第1期

论文作者：王忠金 宋辉 王哲

文章页码：72 - 76

Key words：titanium alloy TC1; sheet; bulging; double-sided pressure; formability

Abstract: In order to investigate the influence of normal stress through thickness on the formability of sheet metal, the viscous pressure bulge(VPB) tests of an annealed TC1 titanium alloy sheet were carried out under two different conditions: double-sided pressure bulging and conventional single-sided pressure bulging. The automated strain analysis, measurement environment (ASAME) and scanning electron microscope(SEM) were used to study the strain distributions and the fracture morphology of bulged specimens. It is found that thickness strain is increased for double-sided pressure bulging specimens, and the limiting dome height(LDH) of double-sided pressure bulging specimens is increased by 31.8% compared with conventional single-sided pressure bulging specimens. The dimples in fracture surface for double-sided pressure bulging specimens are larger and deeper than those for conventional single-sided pressure bulging specimens. The results indicate that normal stress through thickness is helpful in improving the formability of titanium alloy sheet metal.