TY - JOUR
T1 - Microstructure Evolution and Mechanical Behaviors of P92 Steel Welded Joint with Repetitive Post Tempering
AU - Wang, Yu
AU - Jian, Yongxin
AU - Xu, Rongbo
AU - Wang, Quansheng
AU - Zhang, Xiaoming
AU - Dang, Wenjing
AU - Huang, Zhifu
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/7
Y1 - 2023/7
N2 - The microstructure evolution and mechanical properties of P92 steel welded joint have been systematically investigated relating to the number of tempering cycles. Martensite laths, M23C6 precipitates, and tiny MX phase have been characterized in P92 base metal (BM). Likewise, the heat-affected zone (HAZ), fusion zone (FZ), and weld metal (WM) show the similar feature of phase composition to the BM. However, δ-ferrite patches can be found in FZ. With the increasing number of tempering cycles, the area fraction and average size of M23C6 precipitates gradually increase in HAZ and FZ despite that microstructure has little change. Consequently, the hardness, ultimate tensile strength, and yield strength tend to decrease, while the elongation can be improved in some degree. The reduction in solution strengthening, grain refinement strengthening, and precipitation strengthening is responsible for the strength degeneration of P92 steel welded joint with reduplicative tempering.
AB - The microstructure evolution and mechanical properties of P92 steel welded joint have been systematically investigated relating to the number of tempering cycles. Martensite laths, M23C6 precipitates, and tiny MX phase have been characterized in P92 base metal (BM). Likewise, the heat-affected zone (HAZ), fusion zone (FZ), and weld metal (WM) show the similar feature of phase composition to the BM. However, δ-ferrite patches can be found in FZ. With the increasing number of tempering cycles, the area fraction and average size of M23C6 precipitates gradually increase in HAZ and FZ despite that microstructure has little change. Consequently, the hardness, ultimate tensile strength, and yield strength tend to decrease, while the elongation can be improved in some degree. The reduction in solution strengthening, grain refinement strengthening, and precipitation strengthening is responsible for the strength degeneration of P92 steel welded joint with reduplicative tempering.
KW - P92 welded joint
KW - mechanical properties
KW - microstructure evolution
KW - tempering
UR - https://www.scopus.com/pages/publications/85150590275
U2 - 10.1002/adem.202300018
DO - 10.1002/adem.202300018
M3 - 文章
AN - SCOPUS:85150590275
SN - 1438-1656
VL - 25
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 13
M1 - 2300018
ER -