基于正交试验法的7055T7751铝合金时效蠕变性能研究  

Orthogonal Experimental Study on Creep Aging Behavior of 7055T7751 Aluminum Alloy

作　　者：史建猛 李宾良 张海宝 SHI Jianmeng;LI Binliang;ZHANG Haibao(AVIC Xi’an Aircraft Industrial Group Company Ltd.,Xi’an 710089,China)

机构地区：[1]中航西安飞机工业集团股份有限公司,西安710089

出　　处：《航空制造技术》2021年第12期80-84,共5页Aeronautical Manufacturing Technology

摘　　要：基于正交试验方法设计了7055T7751铝合金的单向拉伸时效蠕变试验,应用正交多项式回归方法对试验结果进行分析,得到了7055T7751铝合金经时效蠕变后的屈服强度与预应力、时效温度和时效时间的经验公式,并分析了上述3个工艺参数对7055T7751铝合金经蠕变后的屈服强度的影响规律。This paper presents an orthogonal experimental design on the creep aging test for 7055T7751 aluminum alloy by uniaxial stretch.An empirical formula on calculating the yield strength from the prestress,aging temperature and aging duration after creep aging is obtained by analyzing the experimental results using the orthogonal polynomial regression method.In addition,the effects of the three process parameters on the yield strength of 7055T7751 aluminum alloy after creep aging are investigated.

关 键 词：正交试验法 7055T7751铝合金 时效蠕变 屈服强度 时效成形 飞机整体壁板 

分 类 号：TG146.21[一般工业技术—材料科学与工程]