预时效对含0.1%In的Al-Mg-Si合金微观结构和力学性能的影响
Effect of pre-aging on microstructure and mechanical properties of Al-Mg-Si alloy containing 0.1%In
查看参考文献18篇
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文摘
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采用硬度测试、拉伸测试、扫描电镜和透射电镜系统研究微量In添加与不同预时效工艺对Al-Mg-Si合金微观结构和力学性能的影响。结果表明:添加0.1%(质量分数)In的Al-Mg-Si合金在100℃/3h预时效下,同时具有较低的T4P态硬度以及更高的烘烤硬度(118.56HV,相比于无预时效的Al-Mg-Si合金硬度提高了15.08%)和抗凹陷性。这说明预时效处理和In微合金化的复合作用能够抑制自然时效的有害影响,并提高合金的烘烤硬化性。微量In添加能够细化Al-Mg-Si合金中的含Fe相,促进合金时效过程中β″相的形成,从而提高合金的硬度。但是,In元素添加降低了Al-Mg-Si合金的伸长率,这是由In在铝基体中固溶度较低,形成了In颗粒导致的。 |
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其他语种文摘
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The combined effect of trace addition of In and different pre-aging processes on the microstructure and mechanical properties for Al-Mg-Si alloys was investigated by using hardness test, tensile test,scanning electron microscope(SEM)and transmission electron microscope(TEM).The results show that the pre-aged Al-Mg-Si alloy with 0.1%(mass fraction)In addition has low hardness in T4Pstate with 100℃/3hpre-aging treatment,and higher hardness(118.56HV,compared with the no-pre-aging Al-Mg-Si alloy,hardness is increased by 15.08%for the pre-aged Al-Mg-Si-In alloy) after paint baking and the depression resistance of the alloy is improved.This indicates that the combination of pre-aging treatment and In microalloying can inhibit the harmful effects of natural aging and improve the paint bake hardening.Trace addition of In can improve the hardness of Al-Mg- Si alloys by refining Fe-containing phase and promoting the formation ofβ″phase during artificial aging of the alloy.However,trace addition of In decreases the elongation of the Al-Mg-Si alloy, which may be caused by the formation of In-containing particles.The low solid solubility of In element in aluminum leads to the formation of In-containing particle. |
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来源
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材料工程
,2023,51(6):101-110 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2021.000759
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关键词
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Al-Mg-Si合金
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预时效
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In添加
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自然时效
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析出强化
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地址
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1.
南京工程学院材料科学与工程学院, 南京, 211167
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南京工程学院, 江苏省先进结构材料与应用技术重点实验室, 南京, 211167
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金青年基金
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江苏省自然科学基金青年基金
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江苏省高等学校自然科学研究面上项目
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南京工程学院大学生创新创业项目
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江苏省大学生创新创业训练计划项目
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文献收藏号
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CSCD:7505509
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