PSI - Issue 68

Mahmoud Khedr et al. / Procedia Structural Integrity 68 (2025) 1017–1023 Mahmoud Khedr / Structural Integrity Procedia 00 (2025) 000–000

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Figure 3. Microstructures of HAZs of LCS/MMn-SS and LCS/NiCr-SS; (a), (b) HAZs of LCS and MMn-SS, respectively in the LCS/MMn– SS joint, (c), (d) HAZs of LCS and NiCr-SS, respectively in the LCS/NiCr-SS joint.

Figure 4. Hardness profile showing the hardness of the LCS sides, weld metals, MMn-SS, and NiCr-SS sides.

3.3. Tensile properties The mechanical tensile properties of the LCS/MMn-SS and LCS/NiCr-SS joints compared with the BMs are illustrated in Table 3. In addition, Figure 5 shows the stress-strain curves of BMs and welded joints at a strain rate of 10 -3 s -1 . The ultimate tensile strengths of LCS, MMn-SS, and NiCr-SS BMs were 362, 915, and 738 MPa, respectively.