Effect of post-weld heat treatment (PWHT) on the intergranular corrosion of ENiCrFe-7 weld overlay cladding materials

Guo, P.L.; Ligong, Ling

doi:10.1016/j.jmrt.2020.05.101

Cited by 6 publications

(1 citation statement)

References 15 publications

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“…High contents of Mn and Nb could improve the notch strength and ductility at 300 °C, while they had little effects on the tensile strength at room temperature. In addition, Guo et al [13][14][15][16] studied the effects of post weld heat treatment (PWHT) on microstructure, mechanical properties, residual stress, and corrosion resistance of ENiCrFe-7 deposited metal at 615 °C for 16 h and 48 h.…”

Section: Introductionmentioning

confidence: 99%

Investigating the microstructure and mechanical properties of deposited metal with ENiCrFe-7 covered electrode

Zhu,

Yu,

Liu

et al. 2023

Mater. Res. Express

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The effect of post weld heat treatment (PWHT) on microstructure and mechanical properties of deposited metal using ENiCrFe-7 covered electrode was investigated. The PWHT was conducted at 615°C for 24 h. The results showed that three types of precipitates existed in both as-welded and PWHT deposited metals, i.e, NbC carbides, Al-Ti oxides in grains, and M23C6 carbides on grain boundaries. The M23C6 carbides coarsened after PWHT. The room temperature and elevated temperature (350°C) tensile strength decreased by about 30 MPa, and elongation increased by about 3-4% after PWHT. The tensile specimens presented ductile fracture feature and the dimples in PWHT condition were larger than that in as-welded condition. The hardness of deposited metal in as-welded condition was higher than that of PWHT condition. The impact toughness showed no significant change after PWHT. Both as-welded and PWHT impact specimens showed a mixed fracture mode with dominant ductile fracture and cleavage fracture.

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Section: Introductionmentioning

confidence: 99%