Effect of heat dissipation on solidification cracking behaviour of austenitic stainless steel during gas tungsten arc welding
Effect of heat dissipation on solidification cracking behaviour of austenitic stainless steel during gas tungsten arc welding
复制标题
散热对奥氏体不锈钢钨极氩弧焊凝固裂纹行为的影响
DOI：
10.1080/13621718.2021.1935152
复制
发表时间：
2021
影响因子：
3.3
通讯作者：
Saida Kazuyoshi
中科院分区：
文献类型：
--
作者：
Lee Jae-Hyeong;Yamashita Shotaro;Ogura Tomo;Saida Kazuyoshi
在钨极氩弧焊（GTAW）U型热裂纹试验中，背面不锈钢经受连续水流（水冷GTAW）以防止凝固裂纹。用电子背散射衍射和有限元法评价了合金的凝固裂纹敏感性。由于水冷过程使枝晶结构的取向差角减小，固液界面能增加，使熔析膜不稳定，二次枝晶臂之间发生桥接。增加的热耗散导致高度有序的枝晶的形成。因此，可以促进柱状枝晶的生长方向的均匀性。此外，降低临界合并过冷度降低了残余熔析膜的稳定性，并减少了焊缝中的应力集中。
During the U-type hot cracking test of gas tungsten arc welding (GTAW), the back side stainless steel was subjected to a continuous water flow (water-cooled GTAW) to prevent solidification cracking. The solidification cracking susceptibility was evaluated by electron backscatter diffraction and a finite element method. As the misorientation angle of the dendrite structure decreased due to the water-cooling process, the solid–liquid interface energy increased, making the liquation film unstable, and bridging occurred between the secondary dendrite arms. The increased heat dissipation resulted in the formation of highly ordered dendrites. Therefore, uniformity in the growth directions of columnar dendrites can be promoted. Furthermore, decreased critical coalescence undercooling reduced the residual liquation film stability and decreased stress concentration in the weld bead.
晶界工程全奥氏体不锈钢的微观结构演变和凝固裂纹敏感性
影响因子：
2.1
作者：
S. Tokita;K. Kadoi;Y. Kanno;H. Inoue
通讯作者：
H. Inoue
稳定化奥氏体不锈钢的熔合区和热影响区开裂敏感性
影响因子：
3.3
作者：
V. Shankar;T. Gill;S. Mannan;S. Sundaresan
通讯作者：
S. Sundaresan
奥氏体不锈钢焊缝金属的热裂纹
DOI：
--
发表时间：
2000
期刊：
影响因子：
--
作者：
V. M. Radhakrishnan
通讯作者：
V. M. Radhakrishnan