On the addition of precipitation- and work-hardening in an Al–Sc alloy
On the addition of precipitation- and work-hardening in an Al–Sc alloy
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关于在 Al-Sc 合金中添加沉淀硬化和加工硬化
DOI：
10.1016/j.msea.2006.09.164
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发表时间：
2008
期刊：
影响因子：
6.4
通讯作者：
O. Reiso
中科院分区：
文献类型：
--
作者：
J. Røyset;N. Ryum;D. Bettella;Alessio Tocco;Z. Jia;J. K. Solberg;O. Reiso
对Al-0.2wt.%Sc试样进行固溶处理和析出热处理。固溶热处理后的析出硬化响应取决于储存时间。发现了强度相等的未成熟状态和过老化状态。透射电子显微镜显示，在欠时效状态下，位错以剪切方式通过析出相，而在过时效状态下，位错不以剪切方式通过析出相。应力-应变曲线分析表明，两种条件下的加工硬化行为存在显著差异。
Specimens of Al–0.2wt.% Sc were solution heat treated and subjected to precipitation heat treatment. Precipitation-hardening response depended on storage time after solution heat treatment. An underaged condition and an overaged condition with equal strengths were found. Transmission electron microscopy indicates that the dislocations pass the precipitates by shearing in the underaged condition, and not in the overaged conditions. Analyses of stress–strain curves show significant differences in work-hardening behaviour between the two conditions.