CAJ | 학술논문

在Gleeble-1500热模拟机上对7056铝合金进行热压缩实验,变形温度为300～450℃,应变速率为0.01～10 s~(-1),研究其热压缩流变应力行为.结果表明:流变应力开始随应变的增加而增大,出现峰值后逐渐趋于平稳;应力峰值随着温度的升高而减小,随着应变速率的增大而增大;可用包含Zener-Hollomon参数的双曲正弦关系来描述合金热流变行为,其变形激活能为224.3826 kJ/mol.
재Gleeble-1500열모의궤상대7056려합금진행열압축실험,변형온도위300～450℃,응변속솔위0.01～10 s~(-1),연구기열압축류변응역행위.결과표명:류변응력개시수응변적증가이증대,출현봉치후축점추우평은;응력봉치수착온도적승고이감소,수착응변속솔적증대이증대;가용포함Zener-Hollomon삼수적쌍곡정현관계래묘술합금열류변행위,기변형격활능위224.3826 kJ/mol.
The flow stress behavior of 7056 aluminum alloy during hot compression deformation was studied by thermal simulation test on Gleeble 1500 system. The deformation temperature is from 300 ℃to 450 ℃ and the strain rate is from 0.01 s~(-1) to 10 s~(-1). The results show that the flow stress increases with the increase of strain and tends to be constant after a peak value. The peak stress increases with the increase of strain rate, and decreases with the increase of deformation temperature, which can be represented by a Zener-Hollomen parameters in the hyperbolic sine equation, and the hot deformation activation energy is 224.3826 kJ/mol.