Advanced Search
KE Liming, PAN Jiluan, XING Li, HUANG Yongde. The flowing behavior of weld metal in thickness of the plate and the formation mechanism of the onion ring[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (7): 39-42.
Citation: KE Liming, PAN Jiluan, XING Li, HUANG Yongde. The flowing behavior of weld metal in thickness of the plate and the formation mechanism of the onion ring[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (7): 39-42.

The flowing behavior of weld metal in thickness of the plate and the formation mechanism of the onion ring

More Information
  • Received Date: August 13, 2007
  • The plastic flow behavior of the weld metal during friction stir welding was analyzed by using the multi-plate piled up with several thin copper foils and aluminum sheets and the copper foils serves as a marker material.The results show that there is a serious material translation in the thickness of the weld along the screw thread if using a pin with screw threaded surface.These flowing materials will slough off from the thread at the tip or root of the pin and squeeze into the surrounding area, forming a solid ring with the center being the circle of tip or root of the pin.There is a distinct boundary between the solid ring and its surrounding parent metal. The onion ring is actually the projecting picture of the solid ring cut at the cross section of the weld.The driving force of the metal flow in the thickness of the weld is the pressure of the skew threads on the pin surface to its surrounding plastic metal.When the stir tool rotates clockwisely, the center of the onion rings deflect to the bottom of the weld in the case of the pin with left-hand skew thread on its surface, or deflect to the up surface of the weld in the case of the pin with right-hand skew thread on its surface.
  • Related Articles

    [1]XU Zhiwu, LI Zhengwei, FENG Yan, YAN Jiuchun. Microstructure and mechanical properties of Mg/Al friction stir lap welding joint assisted by stationary shoulder[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 1-6. DOI: 10.12073/j.hjxb.20170401
    [2]MAO Yuqing, KE Liming, HUANG Bin, LIU Fencheng. Effect of shoulder profile on plastic flow of weld metal in aluminum alloys friction stir welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(3): 27-32.
    [3]MAO Yuqing, KE Liming, LIU Fencheng, LIU Qiang. Effect of pin eccentricity on flow behavior of plastic material in friction stir welds[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 51-56.
    [4]WANG Weibing, LUAN Guohong, ZHANG Kun, ZHAO Huaxia. Fundamental model of plastic material flow in FSW[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(12): 71-74.
    [5]WANG Xijing, XU Youwei, ZHANG Liangliang, WEI Wankui. Plastic metal flow characteristic and fracture behaviors of DP600/AZ31 with non-keyhole friction stir spot welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(12): 57-60,70.
    [6]JI Shude, MENG Qingguo, SHI Qingyu, ZHANG Liguo, ZOU Aili. Numerical simulation of metal plastic flow in friction stir welding affected by pin shape[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (2): 93-96.
    [7]YU Yong-zheng, LUO Yu, LUAN Guo-hong, SUN Cheng-bin. Metal flow behavier in friction stir welding of LF6 aluminum alloy and LD10 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2004, (6): 115-118.
    [8]YU Yong-zheng, LUO Yu, LUAN Guo-hong. Factors affecting on metal plastic flow during friction stir welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2004, (5): 117-120.
    [9]ZHANG Hua, LIN San bao, WU Lin, FENG Ji cai, LUAN Guo hong. Current progress and prospect of friction stir welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2003, (3): 91-96.
    [10]Du Suigeng, Liu Xiaowen, Wu Shichun, Li Xiaoxia. Plastic Flow Equation of Weld Metal during Quasi-steady Friction Stage[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1999, (4): 219-224.

Catalog

    Article views (260) PDF downloads (89) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return