Effect of temperature on the fracture behaviour of heat-treated Al-Cu-Li alloy laser welds under low-cycle fatigue loading

被引：9
|
作者：
Malikov, Alexander G. [1 ]
Karpov, Evgenij V. [1 ,2 ]
Orishich, Anatoliy M. [1 ]
机构：
[1] Russian Acad Sci, Khristianovich Inst Theoret & Appl Mech, Siberian Branch, Inst Skaya Str 4-1, Novosibirsk 630090, Russia
[2] Russian Acad Sci, Lavrentiev Inst Hydrodynam, Siberian Branch, Novosibirsk, Russia
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2020年 / 43卷 / 06期
基金：
俄罗斯科学基金会;
关键词：
aluminium-lithium alloy; fatigue strength; heat treatment; laser welding; microstructure; tensile strength; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; CRACK RETARDATION; ALUMINUM-ALLOY; T-JOINTS; MICROSTRUCTURE; MG; AA2198; PROPAGATION; PREDICTION;
D O I：
10.1111/ffe.13218
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The paper presents the results of the studies of the effect of temperature on the fracture behaviour of Al-Cu-Li alloy laser welds under low-cycle fatigue loading. The mechanical properties and the microstructure of the welded joints without and after postweld heat treatment (PWHT) were investigated. The tensile strength and the low-cycle fatigue resistance of the welded joints were studied at various test temperatures (20 degrees C, 85 degrees C and - 60 degrees C). It was been found that heating up to 85 degrees C and cooling down to -60 degrees C reduced the maximum number of loading cycles of the welded joints after PWHT by 1.5-2.0 times compared with that at a test temperature of 20 degrees C.
引用
收藏
页码：1250 / 1261
页数：12
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