单晶铜线在强冷变形过程中的组织性能转变

Special Casting & Nonferrous Alloys(2011)

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Abstract
研究了强冷变形条件下单晶铜的组织性能变化,并探讨了强冷加工对单晶铜组织性能的影响规律及其机制。结果表明,由于单晶铜特殊的组织结构,其在强冷变形加工过程中,一些亚晶、微结构等在变形后期不断产生,呈现出类似多晶体的组织形貌;单晶铜线的电导率随变形量增加而不断降低,降低速率呈S型变化,先慢后快再慢;形变初期OCC单晶铜杆的加工硬化率高,进入强冷加工阶段时,加工硬化速率降低,伸长率呈小幅下降趋势,强度增幅下降,趋于持平;在伸长率低于3%的情况下单晶铜线仍能实现大变形量的变形。
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Key words
Single Crystal Copper,Strong Cold Deformation,Microstructure
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