The corona bond response to normal stress distribution during the process of rotary friction welding
The corona bond response to normal stress distribution during the process of rotary friction welding
复制标题
旋转摩擦焊接过程中电晕键对法向应力分布的响应
DOI：
10.1007/s40194-018-0595-5
复制
发表时间：
2018-09-01
影响因子：
2.1
通讯作者：
Zhang, Fusheng
中科院分区：
文献类型：
--
作者：
Jin, Feng;Li, Jinglong;Zhang, Fusheng
对φ 25 mm的SUS304不锈钢棒在不同的焊接压力、转速和摩擦时间下进行连续驱动旋转摩擦焊接。在摩擦界面处，测量法向应力分布，并且电晕结合（即，增塑金属）进行了表征。结果表明，在恒定的焊接压力下，法向应力开始于样品界面的周边，留下内部区域，在摩擦过程的最初阶段似乎未接触。此后，正应力沿着径向方向向内延伸。这导致其呈“U”形分布。周边区域的正应力比内部区域的正应力增长快得多，导致应力呈“V”形分布。然后，中心的应力不断增加，分布逐渐变成“M”形。应力最终均匀分布。法向应力分布的演变决定了电晕键的演变。同时，电晕键的演化对正应力的分布也有一定的影响。此外，在不同的焊接参数下也观察到类似的现象。
Continuous drive rotary friction welding was conducted on SUS304 stainless steel rods in diameter of phi 25 mm under different welding pressures, rotation speeds, and friction time. At the friction interface, the normal stress distributions were measured, and the corona bond (i.e., plasticized metal) was characterized. The results show that, under a constant welding pressure, the normal stress initiates at the periphery of the sample interface, leaving the inner area that seems un-contacted at the very beginning of the friction process. Thereafter, the normal stress extends inside along the radial direction. which leads to its distribution presenting like a "U" shape. The normal stress at the periphery increases much faster than it at the inner area, resulting in the distribution presenting like a "V" shape. Then, the stress in the center continuously increases and the distribution gradually changes into "M" shape. The stress is lastly homogenously distributed. Evolution of the normal stress distribution determines the evolution of the corona bond. At the same time, evolution of the corona bond reacts on the distribution of normal stress. In addition, similar phenomena have been observed under different welding parameters.