| 引用本文: | 李文斌,潘清林,刘俊生,梁文杰,刘晓艳,何运斌.强化固溶对含Sc超高强铝合金组织性能的影响[J].材料科学与工艺,2010,18(3):352-355,362.DOI:10.11951/j.issn.1005-0299.20100313. |
| LI Wen-bin,PAN Qing-lin,LIU Jun-sheng,LIANG Wen-jie,LIU Xiao-yan,HE Yun-bin.Effect of promotively-solutionizing treatment on microstructure and properties of ultra-high strength aluminum alloys containing Sc[J].Materials Science and Technology,2010,18(3):352-355,362.DOI:10.11951/j.issn.1005-0299.20100313. |
|
| 摘要: |
| 为了提高含Sc超高强Al-Zn-Cu-Mg-Zr合金的固溶程度,减少未溶结晶相的数量,用极差分析方法对强化固溶处理制度进行了优化.采用拉伸试验、金相和透射电镜分析、扫描电镜观察和能谱分析等方法研究了强化固溶对合金力学性能和组织的影响.结果表明,与常规固溶相比,强化固溶后合金的屈服强度和抗拉强度分别提高了28MPa和18MPa,合金的断口形貌呈现晶内韧窝与沿晶破裂的混合断裂,强化固溶后合金的力学性能有所改善,残余的第二相数量明显减少,η′析出相也更细小、弥散. |
| 关键词: 含Sc超高强铝合金 强化固溶 力学性能 显微组织 断裂 |
| DOI：10.11951/j.issn.1005-0299.20100313 |
| 分类号:TG146.21 |
| 基金项目:国家高技术研究发展计划资助项目(2006AA03Z523) |
|
| Effect of promotively-solutionizing treatment on microstructure and properties of ultra-high strength aluminum alloys containing Sc |
|
LI Wen-bin1,2, PAN Qing-lin1, LIU Jun-sheng1, LIANG Wen-jie1, LIU Xiao-yan1, HE Yun-bin1
|
|
1.School of Materials Science and Engineering,Central South University,Changsha 410083,China;2.School of Civil Engineering,Hunan City University,Yiyang 413000,China
|
| Abstract: |
| The optimization of promotively-solutionizing was analyzed with range analysis method to promote the solution degree and reduce the residual constituents of the ultra-high strength Al-Zn-Cu-Mg-Zr alloy containing Sc.The effects of promotively-solutionizing on mechanical properties and microstructure of the alloy were investigated by tensile tests,optical microscope(OM) and transmission electron microscope(TEM),scanning electron microscope(SEM) and energy dispersive spectrometer(EDS).The results show that the yield strength and ultimate strength of the alloy after promotively-solutionizing increase 28 MPa and 18 MPa respectively compared with whose after single solution treatment,and the fracture morphology exhibits a complex of transgranular dimple and intergranular rupture.The promotively-solutionizing improves the mechanical properties and reduces the amount of second phase effectively,the precipitate η’are smaller and dispersed. |
| Key words: ultra high strength Al-Zn-Cu-Mg-Zr alloy containing Sc promotively-solutionizing mechanical properties microstructure fracture |
