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ECAP對(duì)連鑄Cu-Ag合金斷口形態(tài)及力學(xué)性能的影響
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國(guó)家自然科學(xué)基金 (51164015)；云南省重點(diǎn)基金 (2011FA026)


Effect of ECAP on Fracture Morphology and Mechanical Properties of Cu-Ag Alloys Produced by Continuous Casting
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    摘要:

    采用連續(xù)鑄造和等徑角擠壓變形(ECAP)加工集成技術(shù)制備Cu-Ag合金，研究其力學(xué)性能和相應(yīng)的拉伸斷口形態(tài)。研究發(fā)現(xiàn)，Cu-Ag合金的強(qiáng)度隨著ECAP加工道次和Ag含量的增加而增加，而延伸率卻下降。連續(xù)鑄造和ECAP加工的合金與傳統(tǒng)澆鑄和ECAP加工的合金相比，縮頸前靜態(tài)韌性有所提高。同時(shí)發(fā)現(xiàn)，只有連鑄的Cu-Ag合金在斷裂前表現(xiàn)出縮頸現(xiàn)象，而經(jīng)ECAP擠壓后試樣的斷裂變?yōu)榧羟心Ｊ?，隨著ECAP道次的增加出現(xiàn)不同的剪切斷裂角?；趯?shí)驗(yàn)結(jié)果，討論了經(jīng)ECAP擠壓后連鑄Cu-Ag合金的拉伸斷裂機(jī)制

    Abstract:

    Cu-Ag alloys were prepared by an integrated technique of continuous casting and equal channel angular pressing (ECAP). Their mechanical properties and tensile fracture morphology were studied. Results show that the strength of Cu-Ag alloys increases with the increase of ECAP passes and Ag content, but their elongation decreases. Static toughness of ECAPed alloys by continuous casting is improved compared with that of ECAPed alloys by traditional casting before necking. Meanwhile, it is found that the alloys only by continuous casting exhibits necking before failure, while the alloys subjected to ECAP fail in shear mode with different shear fracture angles as the number of ECAP passes increases. Based on the experimental results, the tensile failure mechanisms of the ECAPed Cu-Ag alloys by continuous casting were discussed

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沈 月,楊有才,張國(guó)全,付作鑫,謝 明. ECAP對(duì)連鑄Cu-Ag合金斷口形態(tài)及力學(xué)性能的影響[J].稀有金屬材料與工程,2014,43(9):2136~2140.[Shen Yue, Yang Youcai, Zhang Guoquan, Fu Zuoxin, Xie Ming. Effect of ECAP on Fracture Morphology and Mechanical Properties of Cu-Ag Alloys Produced by Continuous Casting[J]. Rare Metal Materials and Engineering,2014,43(9):2136~2140.]
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  • 收稿日期:2013-09-20
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  • 在線發(fā)布日期: 2015-02-25
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