摘要
在Gleeble-1500热/力模拟机上对试验6156合金进行了热压缩试验,研究了其在温度300~450℃和应变速率0.1~10 s-1条件下的热变形行为。结果表明：热变形过程中的流变应力可以很好地用双曲正弦本构关系来描述,通过优化α值,可以更精确地得到该合金的表观激活能为240.97 kJ/mol。根据材料动态模型,计算并分析了6156合金的加工图。利用加工图确定了热变形的流变失稳区,而随着变形温度的升高及变形速率的降低,能量消耗效率η逐渐升高。
Gleeble- 1500 thermaL/mechanical simulator tests on 6156 alloy hot compression tests were studied in the temperature 300- 450 ℃ and strain rate of 0.1 ~ 10 s^-1 under the conditions of hot deformation behavior. The results show that ： during hot deformation, the flow stress can be well described by the hyperbolic sine constitutive; by optimizing the value of a, it can obtain more accurately the apparent activation energy of the alloy which is 240.97 kJ/mol. According to the dynamic materials model,it calculated and analyzed the 6156 alloy processing maps. With use of hot deformation processing maps, it identified areas of flow instability, and as the deformation temperature and deformation rate decreased gradually, the energy consumption efficiency η in creased.
出处
《湖南有色金属》
CAS
2011年第3期38-42,59,共6页
Hunan Nonferrous Metals
