LC4CS铝合金和 30CrMnSiNi2A钢在大气环境预腐蚀后的疲劳曲线  

S─N CURVES FOR LC4CS ALUMINUM ALLOY AND 30CrMnSiNi2A STEEL PRE-CORRODED IN ATMOSPHERIC ENVIRONMENT

作　　者：王斌团[1] 杨庆雄[1] 

机构地区：[1]西北工业大学飞机工程系,西安710072

出　　处：《机械强度》2000年第3期222-223,共2页Journal of Mechanical Strength

摘　　要：使用铝合金ＬＣ４ＣＳ和高强钢３０ＣｒＭｎＳｉＮｉ２Ａ作为模拟疲劳试验件，在大气腐蚀环境中长期放置１～１５年后做疲劳试验，取得不同日历时间下的疲劳特性数据。本文给出０、１、２年的疲劳Ｓ——Ｎ数据，并采用极大似然原理测定出Ｐ—Ｓ—Ｎ曲线。结果表明，大气环境腐蚀后材料的疲劳寿命下降与日历时间有关。这些曲线是确定受腐蚀金属机件或构件疲劳日历寿命的依据。A 20-year-program to study the fatigue calendar life of airframe materials has been carrying on. This paper Presents a part of the two-year-research-result result. Fatigue tests are conducted for specimens of LC4CS aluminum alloy and 30CrMnSiNi2A steel precorroded in atmospheric environment for two years. The fatigue S-N data at given calendar bine of O-year, l-year and 2-year are obtained and P-S-N curves are estimated by maximum likelihood method. The result shows that: l) at the same stress level, the value of fatigue life decreases with the calendar bine, and the deviation increases with the cafeds bine; 2) compared with the O-year S-N curve, the deduction of fatigue life at low stress level is more than that of at high stress level.These data and curves are the has for predicting fatigue calendar life of structure elements in service in atmospheric corrosion environment.

关 键 词：大气环境腐蚀 疲劳曲线 铝合金 高强钢 

分 类 号：TG172.3[金属学及工艺—金属表面处理] TG174.34[金属学及工艺—金属学]