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Equal Channel Angular Deformation (ECAD) of As-Cast AM60 Magnesium Alloy
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作者 pengluo XiaolinWU KenongXIA 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2003年第6期513-515,共3页
As-cast AM60 magnesium alloy ingot with grains coarser than those of as-extruded AZ series is more liable to produce cracks under ECAD with severe shear strain. A feasible scheme of equal channel angular deformation (... As-cast AM60 magnesium alloy ingot with grains coarser than those of as-extruded AZ series is more liable to produce cracks under ECAD with severe shear strain. A feasible scheme of equal channel angular deformation (ECAD) for as-cast AM60 magnesium alloy ingot was proposed in this paper. The tests were conducted on Instron machine with hydraulic back-force machine. Through analysing load us displacement curves, the effects of ECAD processing conditions on deformability and microstructure of as-cast magnesium AM60 billets were discussed. During testing, the back-force employment was helpful to keep ECAD processing more stable. And with back-force, it was observed that the number of ECAD passes in different routes could tremendously affect the deformability and microstructure of magnesium specimens. It was concluded that ECAD processing is entirely feasible for as-cast magnesium AM60 alloy under severe shear strain, and back-force employment, multi-passes deformation and lubrication of graphite paper are the factors primarily beneficial to improvement of deformability and refinement of grained structure. This work provides a way to produce magnesium alloy with fine-grained structure directly from casting ingot by ECAD technique. 展开更多
关键词 ECAD AM60 magnesium alloy DEFORMABILITY METALLOGRAPHY
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Neuro-Knowledge-Based Expert System (NKBES) for Optimal Scheming of Die Casting Process
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作者 QiaodanHU pengluo +1 位作者 YiYANG LiliangCHEN 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第5期622-626,共5页
We develop a neuro-knowledge-based expert system (NKBES) frame in this work. The system mainly concerns with decision of gating system and die casting machine based on a neuro-inference engine launched under the MATLA... We develop a neuro-knowledge-based expert system (NKBES) frame in this work. The system mainly concerns with decision of gating system and die casting machine based on a neuro-inference engine launched under the MATLAB software environment. For enhancement of reasoning agility, an error back-propagation neural network was applied. A rapidly convergent adaptive learning rate (ALR) and a momentum-based error back-propagation algorithm was used to conduct neuro-reasoning. The working effect of the system was compared to a conventional expert system that is based on a two-way (forward and backward) chaining inference mechanism. As the reference, the present paper provided the neural networks sum-squared error (S5E) and ALR vs iterative epoch curves of process planning case mentioned above. The study suggests that the neuro-modeling optimization application to die casting process design has good feasibility, and based on that a novel and effective intelligent expert system can be launched at low cost. 展开更多
关键词 Die casting Neuro-knowledge-based expert system Process planning
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The enactment of thermal efficiency standard for domestic gas appliances and its foreground of Implementing in Chongqing
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作者 PENGShini pengluo FUXiuping 《Journal of Chongqing University》 CAS 2003年第U10期75-78,共4页
This paper analyses the principles we should obey and the problems we should be confronted with when thermal efficiency standards for instantaneous gas water heaters and gas ranges are enacted. It is considered that e... This paper analyses the principles we should obey and the problems we should be confronted with when thermal efficiency standards for instantaneous gas water heaters and gas ranges are enacted. It is considered that enactment of thermal efficiency standards for domestic gas appliances could intensify economization on domestic gas utilization and marked economic and environmental benefits could be generated consequently. 展开更多
关键词 重庆 热效率标准 热水器 煤气消耗
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