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从铝合金的应变时效内耗考察位错与点缺陷的交互作用

谭启

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从铝合金的应变时效内耗考察位错与点缺陷的交互作用

谭启

INVESTIGATION ON THE INTERACTION OF DISLOCATION WITH POINT DEFECTS BY STRAIN AGEING INTERNAL FRICTION OF ALUMINIUM ALLOYS

TAN QI
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  • 研究了合金含量、合金元素和形变条件对铝合金应变时效内耗行为的影响.由此描述了点缺陷的分布状态和位错组态;指出了控制应变时效回复过程的因素是溶质原子的动性和溶质原子与位错的作用能。提出了能描述应变时效过程中位错─—点缺陷交互作用的位错弦脱钉和位错气团拖曳共同作用的复合模型,相应的理论处理合理地解释了实验现象。
    Studies were made on the influnce of alloying content, alloying elements and deformation conditions on the internal friction behavior during strain ageing of aluminium alloys. Therefrom, a description was made on the distribution of point defects and dislocation configuration. It was pointed out that the factors controlling the recovery process of strain ageing are the mobility of solute atoms and interaction energy littween dislocations and solute atoms. A complex model including unpinning of dislocation string and dislocation-atmosphere dragging was proposed. which can describe the interaction between dislocation and point defects in the, process of strain ageing. A corresponding theoretical treatment was made to explain the exper-imental phenomena reasonably.
    • 基金项目: 中国科学技术大学青年科学基金和内耗开放实验室资助的课题.
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  • 文章访问数:  6651
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  • 被引次数: 0
出版历程
  • 收稿日期:  1992-05-08
  • 修回日期:  1994-03-10
  • 刊出日期:  1994-05-05

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