| 引用本文: | 肖代红,陈康华.等径角挤压对Al-Cu-Mg-Ag合金组织性能的影响[J].材料科学与工艺,2011,19(6):129-132,137.DOI:10.11951/j.issn.1005-0299.20110623. |
| XIAO Dai-hong,CHEN Kang-hua.Effect of equal channel angular pressing on microstructure and properties of Al-Cu-Mg-Ag aluminum alloys[J].Materials Science and Technology,2011,19(6):129-132,137.DOI:10.11951/j.issn.1005-0299.20110623. |
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| 摘要: |
| 为研究大塑形变形对耐热铝合金的作用,采用铸冶金工艺制备了新型的Al-Cu-Mg-Ag耐热铝合金,通过显微组织观察、差热分析及硬度测试等方法,研究了等径角挤压对耐热铝合金显微组织与力学性能的影响.结果表明:通过对挤压态的Al-Cu-Mg-Ag耐热铝合金在固溶淬火后时效前进行等径角挤压变形,可获得晶粒尺寸低于2μm的块体超细晶耐铝合金;等径角挤压有助于加速合金的时效析出过程,提高析出相的析出密度,降低晶界的连续析出,从而使合金的强度与耐热性能得到提高. |
| 关键词: 铝铜镁银合金 等径角挤压 显微组织 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20110623 |
| 分类号:TG146.21 |
| 基金项目:湖南省自然科学基金资助项目(10JJ6066);国家重点基础研究发展计划资助项目(2012CB619502) |
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| Effect of equal channel angular pressing on microstructure and properties of Al-Cu-Mg-Ag aluminum alloys |
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XIAO Dai-hong, CHEN Kang-hua
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State Key Lab of Powder Metallurgy,Central South University,Changsha 41083,China
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| Abstract: |
| To research the effect of severe plastic deformation on the heat-resistant aluminum alloys,Al-Cu-Mg-Ag heat-resistant alloys were prepared by ingot metallurgy technology and equal channel angular pressing(ECAP) tests were carried out.The microstructure and mechanical properties of the alloys were investigated using microscopy,differential scanning calorimetry and hardness tester.It is shown that the ECAP in the solid solution and quenching state with aging treatment was quite effective in refining grains to 2 μm and improving the mechanical properties and heat-resistant properties.The ECAP treatment accelerates the aging hardening process of the extruded alloys,and increases the density of precipitate phase. |
| Key words: Al-Cu-Mg-Ag aluminum alloys equal channel angular pressing microstructure mechanical properties |
