两相钛合金(Ti-4.5Al-5Mo-1.5Cr)的高温形变特性

来源期刊：中南大学学报(自然科学版)1990年第6期

论文作者：周宏 丁道云 唐远永

文章页码：632 - 638

关键词：钛合金； 激活能； 高温形变/形变热； 流变区域化

Key words：titanium alloys； actiration energy； high temperature； deformation/deformation heating； flow localization

摘    要：观察了两相钛合金（Ti-4.5Al-5Mo-1.5Cr）在810～940C温度和10⁰s^-1～l0^-3s^-1应变速率范围内的高温形变行为。分析了磨擦力和形变热对此合金高温形变的影响,并采用不同的方法计算出特定条件下的塑性变形激活能。最后,利用流变区域化参数α对合金高温不稳定流变行为进行了详细分析,表明此参数应用的可行性。

Abstract: The high temperature flow behavior of two phase titanium alloy （Ti-4. 5Al-5Mo-1.5Cr） was de-teimined when temperature ranges from 810℃ to 940℃ and constant true-strain rate from 10^-3to10^o s^-1. The effect of interface friction and deformation heating has been estimated for this alloy. Theplastic deformation activation energy has been calculated by using various methods. The flow instabili-ty tendency has been analyzed by the application of flow localization parameter α. This work shows theapplicability of the parameter α to the prediction of flow localization in high temperature deformation.