欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
研究蠕变时效前预处理（15%预变形＋100℃预时效5 h）对可热处理强化2124铝合金蠕变时效成形的影响。采用SEM分析、TEM分析以及测定电导率、维氏硬度和拉伸性能等手段,分析两种不同初始状态试样经过蠕变时效后的微结构和性能。结果表明：初始预处理降低了蠕变时效过程中蠕变初始阶段的蠕变伸长率,但增大了稳态蠕变阶段的蠕变速率;初始预处理对基体中粗大Fe、Si相有一定的破碎作用,蠕变时效过程中,粗大粒子在蠕变应力作用下进一步被破碎;预处理能够改善第二相的析出形态和分布,使析出相分布均匀;预处理试样的电导率比未预处理试样的电导率高,其硬度和强度也较高,但伸长率较低。
英文摘要：
The effect of pre-treatment（15% pre-deformation ＋100 ℃ pre-aging for 5 h）on creep age forming of aluminum alloy 2124 sheets,which can be enhanced by heat treatment,was investigated.The microstructures and properties of two sheets with different pre-treatments were analysed by means of SEM,TEM and measuring the electrical conductivity,Vickers hardness and tensile performance.The results show that the pre-treatment reduces the elongation of the initial stage of creep,but increases the steady-state creep rate;the coarse Fe and Si second phase particles are crushed to certain degree by the pre-treatment,and such coarse particles are further broken down by the subsequent creep stress.The morphology and distribution of the precipitated second phase particles are also improved by pre-treatment.The pre-treated sample depicts higher electrical conductivity,hardness and strength but smaller elongation rate than the non-pre-treated one.
同期刊论文项目
同项目期刊论文
期刊信息
位置：