The superplastic deformation behavior of Ti-24Al-15Nb-1.5Mo alloy with two different methods of based on maximum m value and constant strain rate was studied over the range of 940-1000℃, 5.5×10-5-1.7×10-3s-1 and different tensile axis direction. The result shows that the maximum superplastic elongation of maximum m value is higher than that of the constant strain rate method, and 1596% and 932% are obtained, respectively, at 980℃, T direction and 960℃, 3.3×10-4s-1, 45° to rolling direction, respectively. The elongated grain of primary microstructure will be transformed to equiaxed grain during superplastic tension and the equiaxed grain size increases with decreasing of strain rate and increasing of deformation temperature. The maximum m value method can obviously reduce the generation of cavities.
付明杰, 许慧元, 刘佳佳, 韩秀全. 基于最大m值法和恒应变速率法的Ti3Al基合金超塑变形行为研究[J]. 材料工程, 2015, 43(11): 32-38.
Ming-jie FU, Hui-yuan XU, Jia-jia LIU, Xiu-quan HAN. Superplastic Deformation Behavior of Ti3Al Based Alloy Based on Maximum m Value and Constant Strain Rate Method. Journal of Materials Engineering, 2015, 43(11): 32-38.
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