喷丸成形及强化对2024HDT-T351板材疲劳特性的影响  

Influence of Shot Blasting Forming and Strengthening on Fatigue Property of 2024HDT-T351 Plate

作　　者：王旭[1] 沈培良[1] 高玉魁[1,2] 李强[1] 

机构地区：[1]上海飞机设计研究院强度部,上海201210 [2]同济大学航空航天与力学学院,上海200092

出　　处：《表面技术》2017年第8期165-169,共5页Surface Technology

摘　　要：目的获得喷丸成形及喷丸强化工艺对2024HDT-T351板材疲劳特性的影响规律。方法设计了一种不传载的含紧固件单细节结构疲劳品质试验件,各组试验件相同,变化各组的喷丸参数,进行了试验基准组、喷丸强化组和4种不同参数喷丸成形组、4种不同参数喷丸成形后喷丸强化组的疲劳试验。结果通过疲劳试验和数据处理,获得了各组的疲劳性能、细节疲劳额定值和在相应应力水平下的疲劳寿命。试验结果表明,所有组的细节疲劳额定值均高于试验基准组,其中喷丸强化试验组的疲劳性能提高了24%,喷丸成形试验组的疲劳性能提高了9%~13%,喷丸成形后喷丸强化试验组的疲劳性能提高了9%~24%。结论给出了2024HDT-T351板材喷丸成形及强化疲劳分析合金和表面处理系数B。2024HDT-T351铝合金板材经喷丸强化后、经大弹丸喷丸成形后和经大弹丸喷丸成形后喷丸强化,疲劳分析时合金和表面处理系数B可保守取1.2、1.05、1.05。The work aims to study effects of shot blasting forming and shot blasting strengthening on fatigue property of 2024HDT-T351 plate. A non-load transferring fatigue quality test piece of single detail structure with fastener was designed. Provided with same quantity of specimens and different shot blasting parameters, fatigue test was performed to test baseline group, shot blasting strengthening group, shot blasting forming group with 4 kinds of parameters and combined shot blasting forming ＆ shot blasting strengthening group with 4 kinds of parameters. Fatigue properties, detail fatigue ratings and fatigue life under corresponding stress of all groups were obtained from fatigue test and by data processing. The detail fatigue ratings of all groups were higher than that of the test baseline group, fatigue property of shot blasting strengthening group increased by 24%; for the shot blasting forming group, by 9%-13%; and for the combined shot blasting forming ＆ shot blasting strengthening group, by 9%-24%. The surface treatment coefficient B of 2024HDT-T351 subject to shot blasting forming and shot blasting strengthening for DFR analysis is given. The coefficient B of 2024HDT-T351 plate after shot blasting strengthening, after big shot blasting forming and after combined treatment can be taken as 1.2, 1.05 and 1.05.

关 键 词：喷丸成形 喷丸强化 细节疲劳额定值 疲劳试验 合金和表面处理系数 大弹丸 

分 类 号：V250.3[一般工业技术—材料科学与工程] TG115.57[航空宇航科学与技术—航空宇航制造工程]