Fig. 1. Welding Diagram. (a) J_V joint; (b) J_VC joint

Fig. 2. Stretch sample size and heating process. (a) Stretch sample size; (b) heating process

Fig. 3. Cross sections of J_V,J_V-HT,J_VC,J_VC-HT joints and upper and lower surfaces of J_V and J_VC test plates

Fig. 4. Distribution of elements in the cross-section. (a) J_V joint; (b) J_VC joint; (c) (e) Fe element; (d) (h) V element; (f) Cu element; (g) (i) Ti element

Fig. 5. Cross section microhardness. (a) J_V and J_V-HT joints; (b) J_VC and J_VC-HT joints

Fig. 6. Surface morphology of tensile specimens after fracture. (a) J_V joints; (b) J_V-HT joints; (c) J_VC joints; (d) J_VC-HT joints

Fig. 7. Tensile curves of J_V, J_V-HT, J_VC, and J_VC-HT joints

Fig. 8. Tensile fracture microstructures. (a) J_V joint; (b) J_VC joint; (c) J_V-HT joint; (d) J_VC-HT joint

Fig. 9. XRD results at the FZ_SV and FZ_SCV welds. (a) FZ_SV weld seam of J_V joint; (b) FZ_SV weld seam of J_V-HT joint; (c) FZ_SCV weld seam of J_VC joint; (d) FZ_SCV weld seam of J_VC-HT joint

Fig. 10. Phase distribution and IPF-X diagrams at the FZ_SV and FZ_SCV welds. (a) FZ_SV weld seam of J_V joint; (b) FZ_SV weld seam of J_V-HT joint; (c) FZ_SCV weld seam of J_VC joint; (d) FZ_SCV weld seam of J_VC-HT joint; (a1) (b1) (c1) (d1) IPF-X diagram

Fig. 11. Grain size at FZ_SV and FZ_SCV welds. (a) FZ_SV weld seam of the J_V joint; (b) FZ_SV weld seam of the J_V-HT joint; (c) FZ_SCV weld seam of the J_VC joint; (d) FZ_SCV weld seam of J_VC-HT joint

Fig. 12. The high temperature tensile curves of the reprepared J_VC joint at different temperatures