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大塑性變形Ag-20Cu復(fù)合絲材各相變形特征
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云南省科研院所技術(shù)開(kāi)發(fā)研究專項(xiàng)(2002KFZX-31)；云南省中青年學(xué)術(shù)帶頭人后備人才項(xiàng)目(2006py01-42)


Deformation Characteristics of Metal Clad Metal Ag-20Cu Macro-Composite by Severe Plastic Deformation
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    摘要:

    采用包覆法制備了Ag-20Cu(體積分?jǐn)?shù)，%，下同)復(fù)合材料初始錠坯，熱擠壓成復(fù)合線材，再通過(guò)冷拉拔大變形制得Ag-20Cu復(fù)合絲。分別測(cè)量了不同真應(yīng)變?chǔ)窍聫?fù)合絲材的力學(xué)性能；通過(guò)掃描電鏡測(cè)量不同真應(yīng)變?chǔ)窍翧g和Cu兩相尺寸變化，觀察了其斷裂形貌。通過(guò)上述實(shí)驗(yàn)研究了變形過(guò)程中Ag-20Cu復(fù)合材料的各相變形特征。研究結(jié)果表明：變形過(guò)程中，由于復(fù)合材料各組成相的力學(xué)性能不同，Ag和Cu兩相發(fā)生協(xié)調(diào)變形，且不同變形階段兩相的協(xié)調(diào)變形方式不同；由于各相在變形過(guò)程中存在不同程度的加工硬化和回復(fù)，不同的變形階段，復(fù)合材料的性能變化趨勢(shì)不同，各相對(duì)復(fù)合材料性能的影響也不相同

    Abstract:

    Ag-20Cu macro-composite wires (volume fraction, %, similarly hereinafter), a new DMMCs(Deformation Metal-Metal Composites), were fabricated by metal clad metal method and post-severe plastic deformation. The mechanical properties of the composite wires were tested at different true strains η, and the size change of the Ag layer and the Cu layer and fracture morphology were observed by SEM. The deformation characteristics of the Ag layer and the Cu layer for the Ag-20Cu composite were studied by the above experiments. The results indicate that the deformation process of the composite mainly contains cooperating deformation between Ag and Cu layers due to their different mechanical properties and the modes of cooperating deformation at different stages are different. Because of work-hardening and recovery to different degrees during deformation, the property change trend of the composite is different and the effects of Ag and Cu layers on the properties of the composites are unlike

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耿永紅,郭迎春,畢 珺,張吉明,王傳軍,陳 松,管偉明,張昆華.大塑性變形Ag-20Cu復(fù)合絲材各相變形特征[J].稀有金屬材料與工程,2010,39(4):670~701.[Geng Yonghong, Guo Yingchun, Bi Jun, Zhang Jiming, Wang Chuanjun, Chen Song, Guan Weiming, Zhang Kunhua. Deformation Characteristics of Metal Clad Metal Ag-20Cu Macro-Composite by Severe Plastic Deformation[J]. Rare Metal Materials and Engineering,2010,39(4):670~701.]
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  • 收稿日期:2009-04-20
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