夏灿,周明,杨尚,覃延鑫,周水芳,许世春,吴梵,杨继玺

• 1:云南机电职业技术学院交通工程学院
• 2:昆明理工大学民航与航空学院
• 3:北海市恒科建建设工程质量检测有限公司
• 4:南宁师范大学教育科学学院

摘要(Abstract)：

通过数值模拟及试验相结合的方法，研究了不同Ni含量(0、0.1、0.3和0.5 mass%)的添加对Al-5.6Zn-2.5Mg-1.6Cu合金流动性和力学性能的影响。结果表明：合金的流动性随着Ni含量的增加而增加；当Ni含量为0.5 mass%时，合金的流动性最好，力学性能也显著提高；与未添加Ni的合金相比，添加0.5 mass%Ni的合金的抗拉强度提高了54.79%、屈服强度提高了48.49%、拉伸应变提高了461%。Ni的添加可以降低合金的液相线温度，提高固相线温度，使凝固区间变窄，降低凝固过程中固相线附近的固相分数，降低流动阻力，从而改善合金的流动性；此外，Ni加入后合金中形成了Al_3Ni、Al_3Ni_2等化合物，会与Al基体形成Al-Al_3Ni共晶组织，此共晶组织具有良好的流动性，Al_3Ni还可以细化合金凝固末期糊状区形成的晶粒，降低了糊状区的流动阻力，从而改善合金的流动性。

关键词(KeyWords)： Al-5.6Zn-2.5Mg-1.6Cu;Ni含量;流动性;数值模拟;共晶组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51864026);; 云南省重大专项计划(202202AG050011);; 云南省教育厅科研基金(2024J1417)

作者(Author): 夏灿,周明,杨尚,覃延鑫,周水芳,许世春,吴梵,杨继玺

DOI: 10.13289/j.issn.1009-6264.2024-0295

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