6082-T6铝合金的疲劳性能研究
李可
(中车青岛四方机车车辆股份有限公司,山东 青岛 266000)
摘要:疲劳断裂在铝合金构件中发生的概率非常大,是其发生断裂的主要形式。目前铝合金材料被广泛用于制造业,如高速列车制造等,但同时由于铝合金本身存在的疲劳失效问题导致其应用受限,因此解决铝合金的疲劳失效问题对制造业的轻量化目标有重大意义。本文在6082-T6铝合金基本力学性能试验的基础上研究了在不同置信度和存活率下,横向轧制的6082-T6铝合金板材的疲劳性能。结果显示,置信度50%、存活率50%时,6082-T6铝合金的疲劳强度是161.67 MPa;置信度90%、存活率90%时,6082-T6铝合金的疲劳强度是151.55 MPa;置信度95%、存活率95%时,6082-T6铝合金的疲劳强度是146.63 MPa。制作三种置信度和存活率下的S-N曲线,为预测6082-T6铝合金的疲劳性能提供数据支持。
关键词:6082-T6铝合金;疲劳性能;疲劳强度
中图分类号:U260.6+7 文献标志码:A doi:10.3969/j.issn.1006-0316.2020.12.011
文章编号:1006-0316 (2020) 12-0074-07
Fatigue Performance Investigation of 6082-T6 Aluminum Alloy
LI Ke
( CRRC Qingdao Sifang Co., Ltd., Qingdao 266000, China ) 
Abstract:The probability of fatigue fracture occurring in aluminum alloy components is very high, which is the main form of fracture. In today's world, aluminum alloy materials are widely used in manufacturing, such as high-speed train manufacturing, but at the same time, due to these problems of aluminum alloy itself, the application is limited, so the solution to the fatigue failure of aluminum alloys is the goal of lightweight manufacturing. Of significance, the fatigue properties of 6082-T6 aluminum alloy sheet rolled transversely under different confidence level and probability of failure were studied. The result shows that, the fatigue strength 
 of 6082-T6 is 161.67 MPa; the fatigue strength  is 151.55 MPa; and the fatigue strength   
of 6082-T6 is 146.63 MPa. Besides, The S-N curves under three different confidence level and probability of failure were made to provide data support for predicting fatigue properties of 6082-T6 aluminum all.
Key words:6082-T6 aluminum alloy;fatigue property;fatigue strength
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收稿日期:2019-03-11
作者简介:李可(1991-),山东平度人,硕士研究生,助理工程师,主要从事轨道交通焊接技术研发及材料焊接性测试工作,E-mail:1074899603@qq.com。
 

 

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