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首页> 外文期刊>Journal of Materials Engineering and Performance >Hot Workability Characteristics and Optimization of Processing Parameters of 7475 Aluminum Alloy Using 3D Processing Map
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Hot Workability Characteristics and Optimization of Processing Parameters of 7475 Aluminum Alloy Using 3D Processing Map

机译：7475铝合金使用3D处理地图的热可加工性能与优化

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摘要

Hot compression testing was used to investigate the hot deformation behavior of 7475 aluminum alloy in a temperature range of 573-723 K and a strain rate range of 0.01-10 s(-1). The hot workability was studied by means of constitutive analysis, three-dimensional processing maps, and microstructure characterizations using optical microscopy, electron back-scattered diffraction, and transmission electron microscopy. The results showed that the flow stress was increased with the increment of strain rates or the decrement of deformation temperature. Based on 3D processing, a temperature range of 623-673 K and a strain rate range of 0.01-0.1 s(-1) were proposed to domain the process. Dynamic softening mechanisms were found to be associated with different contributions of dynamic recovery, dynamic recrystallization, and grain boundary sliding in various deformation conditions. These findings, along with the microstructure observation, suggested that the safe-deformation regimes with higher dissipation efficiency could be attributed to the continuous dynamic recrystallization and grain boundary sliding. The flow-instability regimes could be caused by the flow localizations and the adiabatic shear bands.
机译：热压缩测试用于研究7475铝合金的热变形行为，在573-723k的温度范围和0.01-10s（-1）的应变率范围内。通过使用光学显微镜，电子背散射衍射和透射电子显微镜的本构体分析，三维处理图和微观结构表征研究了热的可加工性。结果表明，随着应变速率的增量或变形温度的减小，流量应力增加。基于3D处理，提出了623-673k的温度范围和0.01-0.1s（-1）的应变速率范围为域的过程。发现动态软化机制与各种变形条件中的动态回收，动态重结晶和晶界滑动的不同贡献相关。这些发现以及微观结构观察表明，具有较高耗散效率的安全变形制度可能归因于连续动态再结晶和晶界滑动。流动稳定性制度可能由流量局部和绝热剪切带引起。

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