期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2021
卷号：2
期号：12
页码：15-21
DOI：10.15587/1729-4061.2021.227224
语种：English
出版社：PC Technology Center
摘要：The paper reports measurement of tensile strength and the thermal cycle of AA6061 aluminum alloy circular bar friction weld with different diameters and various friction times. A continuous drive friction welding (CDFW) of AA6061 was conducted to weld the AA6061 circular bar with different diameters of 30?mm for the rotating part and 15?mm for the stationary part. The CDFW process was carried out with the revolution speed of 1,600?rpm, the initial compressive force of 2.8?kN during the friction stage for various friction times of 10, 12, and 14?seconds, and an upset force of 28?kN for 60?seconds. The flash temperature was measured using a digital infrared thermometer gun. Computer simulation using the finite element method was also done by coupling transient thermal and static structural methods. The flash temperature becomes higher along with increasing friction time based on the digital infrared thermometer gun measurement and finite element analysis. The results of tensile strength testing show that the specimen with a friction time of 12?seconds has the highest tensile strength. Based on the hardness testing result, it is found that the specimen with a friction time of 10?seconds has higher hardness, but it has an incomplete joint flash so that the tensile strength is lower than that of the specimen with a friction time of 12?seconds. Besides, the hardness of the specimen with a friction time of 12?seconds is higher than that of the specimen with a friction time of 14?seconds. The flash size becomes bigger along with the increase of the friction time based on the macrostructure observation on the longitudinal?section of the CDFW specimen. It is confirmed by the temperature measurement and finite element analysis that the specimen with a friction time of 12?seconds has heat input to form the CDFW joint that has a maximum tensile strength in the range of this study.
关键词：Aluminum;Friction Welding;Tensile Strength;Finite Element Analysis;Thermal cycle
