【摘 要】
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The deformation behavior of as-sintered CNTs/Al-4Cu composite was investigated by isothermal compression tests,which were performed among temperature range of 300-550℃ and strain rate range of 0.001-1
【出 处】
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第六届海内外中华青年材料科学技术研讨会暨第十五届全国青年材料科学技术研讨会
论文部分内容阅读
The deformation behavior of as-sintered CNTs/Al-4Cu composite was investigated by isothermal compression tests,which were performed among temperature range of 300-550℃ and strain rate range of 0.001-10 S-1 with Gleeble-3500 thermal simulator system,and the height reduction was 60％.The flow stress-strain curves and the processing maps at strain of 0.1-0.6 were used to characterize the deformation behavior of as-sintered CNTs/A1-4Cu composite,the microstructures of the deformed specimens were also observed in this paper.The results show that the flow stress increases with the strain rate at a setting deformation temperature and decreases with temperature at a setting strain rate,the flow strain increases rapidly with the increase of the strain due to dislocation generation.The strain does have a little influence on the processing maps,the optimum processing domain is the temperature range of 630 K-660K and the strain rate range of 0.03-0.3 S-1,and the peak efficiency of power dissipation at a strain of 0.5 is about 33％.
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