Scholarlink

<p>Laser welding with wire filler addition has been a potential manufacture technique for the nuclear pressure vessels manufacturing. However, laser welding by using only single nickel-based alloy wire or austenitic stainless steel wire still faces some challenges, such as non-fusion, cracks, low mechanical properties and C element migration. Thus, we assess the possibility of filling 52&#xa0;M and 308&#xa0;l dissimilar wires for a narrow gap laser welding of SA508 and 316&#xa0;l dissimilar metals in nuclear pressure vessels fabrication in this paper. The results showed that with increasing the ratio of 308&#xa0;l filling wire from 25 to 75%, the fusion line boundary of 52&#xa0;M/Weld metal gradually became obvious and the size of the cellular and dendritic grains increased slightly in the weld metal. The results also indicated that the average yield strength (YS) of the welded joints obtained with different ratio of the filling double wires was about 322&#xa0;MPa, which was between that of the 316&#xa0;l stainless steel and the SA508 low alloy ferritic steel base metals. Additionally, the average ultimate tensile strength (UTS) of the joints obtained with different ratio of the double filling wires was about 571&#xa0;MPa, which was lower than that of the 316&#xa0;l and the SA508 base metal. The maximum UTS of the welded joint was achieved when the 52&#xa0;M/308L filling wires ratio was 3:1. The maximum impact fracture absorbed energy of the welded joint was obtained when the 52&#xa0;M/308L filling wires ratio was 1:3. When the ratio of the 308&#xa0;l filling wire increased, the impact fracture absorbed energy gradually increased.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microstructure and Mechanical Properties of Dissimilar Metal Welded Joints for Nuclear Applications Using Laser Welding with Dissimilar Filler Wire Addition

  • 期刊论文

  • 发表日期：

    2025年6月24日

查看全文
  • Jiecai Feng,
  • Longhui Tao,
  • Hongfei Liu,
  • Chuanwan Luo,
  • Jinping Liu,
  • Yilian Zhang,
  • Meng Jiang,
  • Xi Chen,
  • Yingzhong Tian

摘要

Laser welding with wire filler addition has been a potential manufacture technique for the nuclear pressure vessels manufacturing. However, laser welding by using only single nickel-based alloy wire or austenitic stainless steel wire still faces some challenges, such as non-fusion, cracks, low mechanical properties and C element migration. Thus, we assess the possibility of filling 52 M and 308 l dissimilar wires for a narrow gap laser welding of SA508 and 316 l dissimilar metals in nuclear pressure vessels fabrication in this paper. The results showed that with increasing the ratio of 308 l filling wire from 25 to 75%, the fusion line boundary of 52 M/Weld metal gradually became obvious and the size of the cellular and dendritic grains increased slightly in the weld metal. The results also indicated that the average yield strength (YS) of the welded joints obtained with different ratio of the filling double wires was about 322 MPa, which was between that of the 316 l stainless steel and the SA508 low alloy ferritic steel base metals. Additionally, the average ultimate tensile strength (UTS) of the joints obtained with different ratio of the double filling wires was about 571 MPa, which was lower than that of the 316 l and the SA508 base metal. The maximum UTS of the welded joint was achieved when the 52 M/308L filling wires ratio was 3:1. The maximum impact fracture absorbed energy of the welded joint was obtained when the 52 M/308L filling wires ratio was 1:3. When the ratio of the 308 l filling wire increased, the impact fracture absorbed energy gradually increased.