| 王晓璐,赵玉涛,焦雷,钱炜,王研.Zr+Er及Zr+Y对Al-Mg-Si-Cu-Mn-Cr合金组织和拉伸力学性能的影响[J].材料导报,2017,31(18):72-76 |
| Zr+Er及Zr+Y对Al-Mg-Si-Cu-Mn-Cr合金组织和拉伸力学性能的影响 |
| Effects of Zr+Er and Zr+Y on Microstructure and Tensile Properties of Al-Mg-Si-Cu-Mn-Cr Alloys |
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| DOI：10.11896/j.issn.1005-023X.2017.018.015 |
| 中文关键词: 铝合金 微合金化 晶粒细化 弥散相 力学性能 |
| 英文关键词: aluminium alloy, microalloying, grain refinement, dispersed phase, mechanical property |
| 基金项目:国家自然科学基金(U1664254;51174098);高等学校博士学科点专项科研基金(20133227110023);江苏省自然科学基金(BK20160516);国家博士后基金(2016M591780);江苏省博士后基金(1501029B);江苏大学高级人才启动基金(14JDG125) |
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| 摘要点击次数: 3029 |
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| 中文摘要: |
| 采用光学显微镜(OM)、电子显微镜(SEM)、能谱分析仪(EDS)、透射电子显微镜(TEM)和拉伸强度试验研究了0.3%Zr+0.2%Er和0.3%Zr+0.2%Y(质量分数)两种元素组合对Al-0.6Mg-0.9Si-0.5Cu-0.5Mn-0.2Cr合金热处理前后微观组织和力学性能的影响。研究结果表明,两种元素组合的加入均能细化铸态晶粒,其中Zr+Y改性合金的晶粒细化更明显,且两种改性合金铸态的强度和塑性均较基体合金提高。在热处理过程中,两种元素组合会影响合金中弥散相的析出,降低合金的弥散强化效果。最终,Zr+Er改性合金的强度较基体合金提高,而Zr+Y改性合金的强度则较基体降低,两种合金的塑性均较基体降低。 |
| 英文摘要: |
| The effects of 0.3%Zr+0.2%Er and 0.3%Zr+0.2%Y (mass fraction) on the microstructure and mechanical properties of Al-0.6Mg-0.9Si-0.5Cu-0.5Mn-0.2Cr (mass fraction) alloy before and after heat treatment were investigated based on optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), transmission electron microscopy (TEM) and tensile test. The results showed that both Zr+Er and Zr+Y could refine the α-Al grains, and the latter was more prominent and effective. Furthermore, both of them could improve the strength and ductility of the as-cast Al-0.6Mg-0.9Si-0.5Cu-0.5Mn-0.2Cr alloy. With heat treatment, both Zr+Er and Zr+Y had a negative influence on the precipitation of dispersed phase in the alloy and resulted in a decrease in dispersion strengthening. Finally, Zr+Er modified alloy had higher strength than matrix alloy, while Zr+Y modified alloy had lower strength, and both of them had lower elongation than matrix alloy. |
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