Abstract

Mixed powders of Al plus 4 wt % Cu were processed compacting by two different methods which were i) equal channel angular pressing (ECAP) and ii) conventional powder metallurgy (P/M). All specimens were sintered at 600°C for 2 hours under inert argon (Ar) gas atmosphere. These sintered materials were solution treated for 4 and 8 hours at 550°C and then they were quenched to room temperature. After that, all of them were age hardened at particular time periods up to 10 hours at 190°C. Microhardness, microstructures (SEM-EDS analysis) and relative densities of the specimens were studied subsequent to compacting, sintering and age hardening processes respectively. Hardening improvement was achieved after ageing process in the samples produced by both processes. According to the ageing times, the highest microhardness values were obtained with ECAPed specimens which were 101 HV and 105 HV.

中文翻译：

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等通道角挤压铝铜合金粉体的时效强化响应

摘要

Al和4 wt％Cu的混合粉末通过两种不同的方法进行压实处理：i）等通道角挤压（ECAP）和ii）常规粉末冶金（P / M）。将所有样品在惰性氩气（Ar）气氛下于600°C烧结2小时。将这些烧结材料在550℃下固溶处理4和8小时，然后将它们淬火至室温。之后，将它们在190°C的特定时间段内进行时效硬化，直到10个小时。在压实，烧结和时效硬化过程之后分别研究了样品的显微硬度，显微组织（SEM-EDS分析）和相对密度。两种工艺生产的样品在时效处理后均实现了硬化改进。根据老化时间