材料工程2025，Vol.53Issue(4)：43-51,9.DOI:10.11868/j.issn.1001-4381.2024.000504
Ni含量对Al-5.6Zn-2.5Mg-1.6Cu合金热裂倾向的影响
Influence of Ni content on hot tearing tendency of Al-5.6Zn-2.5Mg-1.6Cu alloys
摘要
Abstract
A combination of numerical simulation and experimental methods was used to study the influence of Ni content on the hot tearing tendency of Al-5.6Zn-2.5Mg-1.6Cu-xNi(x=0％,0.1％,0.3％,0.5％,mass fraction,the same below)alloys.The hot tearing tendency of the alloy is systematically simulated using the ProCAST software,combining with optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD),room temperature tensile tests,precipitation phase,stress field,hot tearing index(HTI),and effective stress analysis methods.The hot tearing behavior and mechanical properties of the Al-Zn-Mg-Cu series alloys are systematically studied.The results show that when the Ni content is less than 0.5％,the HTI value first increases and then decreases with the increase of Ni content,and when the Ni content is 0.5％,the HTI value is the lowest.The effective stress at the bottom of the constraint rod also indicates a trend of first increasing and then decreasing with the increase of Ni content,and when the Ni content is 0.5％,the effective stress is the lowest.Compared to the alloy without Ni addition,the alloy with 0.5％Ni addition shows a significant reduction in hot tearing sensitivity,a substantial improvement in mechanical properties,an increase of 54.79％in tensile strength,an increase of 48.49％in yield strength,and an increase of 461％in tensile strain.The numerical simulation results are in good agreement with the experimental results.关键词
Al-5.6Zn-2.5Mg-1.6Cu合金/热裂倾向/数值模拟/有效应力Key words
Al-5.6Zn-2.5Mg-1.6Cu alloy/hot tearing tendency/numerical simulation/effective stress分类
金属材料引用本文复制引用
夏灿,许世春,杨继玺,罗红梅,徐照明,吴梵,李再久..Ni含量对Al-5.6Zn-2.5Mg-1.6Cu合金热裂倾向的影响[J].材料工程,2025,53(4):43-51,9.基金项目
云南省重大专项计划(202202AG050011) （202202AG050011）
国家自然科学基金(51864026) （51864026）
