The compression tests were carried out by Gleeble-1500 thermo-mechanical simulator with samples of semi-solid ZCuSnl0 alloy prepared by strain-induced melt activation （SIMA） process. The original microstruc- ture an...The compression tests were carried out by Gleeble-1500 thermo-mechanical simulator with samples of semi-solid ZCuSnl0 alloy prepared by strain-induced melt activation （SIMA） process. The original microstruc- ture and the deformation temperature of semi-solid ZCuSnl0 alloy are different. The strain is 0.2, and the strain rate is 1 s-1 for the compression test. The results show that when the semi-solid ZCuSnl0 alloy was pre- pared by SIMA process, the liquid fraction of semi-solid microstructure increases, and the solid grain is smaller, more uniform and more inclined to be round as the roiling pre-deformation increasing. The results also indicate that the deformation resistance of ZCuSnl0 alloy in semi-solid state decreases with the deformation temperature increas- ing or the solid fraction of original microstructure de- creasing. The stress-strain curves of the isothermal compression can be divided into quasi-elastic deformation stage and plastic deformation stage, and there are three deformation zones in the samples after isothermal com- pression, namely the difficult deformation zone, the large deformation zone and the free deformation zone. In the three deformation zones, the main deformation mechanism is flow of liquid incorporating solid particles （FLS） mechanism, plastic deformation of solid particles （PDS） mechanism and liquid flow （LF） combining with FLS mechanism, respectively.展开更多
采用Gleeble1500热模拟机对半固态Cu Ni Si合金的触变性能进行了研究,同时分析了不同微量元素、不同变形速率对该合金触变性能的影响。研究表明:添加0.05%Ce元素对该合金触变性能的改善作用较好,微量B元素则对合金的触变性能有阻碍作用...采用Gleeble1500热模拟机对半固态Cu Ni Si合金的触变性能进行了研究,同时分析了不同微量元素、不同变形速率对该合金触变性能的影响。研究表明:添加0.05%Ce元素对该合金触变性能的改善作用较好,微量B元素则对合金的触变性能有阻碍作用。最后试验得出该合金半固态触变变形的最佳工艺参数为:添加0.05%Ce元素,保温温度1048℃,保温时间15s,变形速率为2s-1。展开更多
基金financially supported by the Applied Basic Research Key Project of Yunnan Province in China(No.2011FA007)the Specialized Research Fund for Doctoral Program of Higher Education(No.20125314120013)+1 种基金the Applied Basic Research General Program of Yunnan Province in China(No.2014FB131)the Development Research Fund from Sichuan University of Science and Engineering(No.2013PY05)
文摘The compression tests were carried out by Gleeble-1500 thermo-mechanical simulator with samples of semi-solid ZCuSnl0 alloy prepared by strain-induced melt activation （SIMA） process. The original microstruc- ture and the deformation temperature of semi-solid ZCuSnl0 alloy are different. The strain is 0.2, and the strain rate is 1 s-1 for the compression test. The results show that when the semi-solid ZCuSnl0 alloy was pre- pared by SIMA process, the liquid fraction of semi-solid microstructure increases, and the solid grain is smaller, more uniform and more inclined to be round as the roiling pre-deformation increasing. The results also indicate that the deformation resistance of ZCuSnl0 alloy in semi-solid state decreases with the deformation temperature increas- ing or the solid fraction of original microstructure de- creasing. The stress-strain curves of the isothermal compression can be divided into quasi-elastic deformation stage and plastic deformation stage, and there are three deformation zones in the samples after isothermal com- pression, namely the difficult deformation zone, the large deformation zone and the free deformation zone. In the three deformation zones, the main deformation mechanism is flow of liquid incorporating solid particles （FLS） mechanism, plastic deformation of solid particles （PDS） mechanism and liquid flow （LF） combining with FLS mechanism, respectively.
文摘采用Gleeble1500热模拟机对半固态Cu Ni Si合金的触变性能进行了研究,同时分析了不同微量元素、不同变形速率对该合金触变性能的影响。研究表明:添加0.05%Ce元素对该合金触变性能的改善作用较好,微量B元素则对合金的触变性能有阻碍作用。最后试验得出该合金半固态触变变形的最佳工艺参数为:添加0.05%Ce元素,保温温度1048℃,保温时间15s,变形速率为2s-1。
