【作者】 王平； 董维国； 路贵民； 崔建忠；

【机构】 东北大学材料电磁过程研究教育部重点实验室； 中华人民共和国教育部科技司；

【摘要】 采用Gleeble-1500热学一力学模拟试验机,对半固态铸造铝合金A356进行了半固态压缩和固态压缩实验,分析了它们的应力—应变关系。结果表明:在变形速率<5s^-1的中、低变形速率下压缩,随着变形速率的升高,流动应力增加;在变形速率>5d^-1的高变形速率下压缩,流动应力下降:随变形的增加,半固态压缩发生应变-软化现象。更多还原

【Abstract】 Unilateral compression tests on A356 alloy semi-solid and solid were carried out using a Gleeble-1500 dynamic material testing machine.The relationship between the stree and strain for the deformed semi-solid A356 alloy were analyzed.Results shows that the stress increase with the increase in strain rate if ε<5 s-1,however it decreases with the increase in strain rate if ε>5 s-1,and it decreases also with increase in strain,that is to say,the strain softening occurs during semi-solid deformation.更多还原