N grains. Within the case of heat therapy at 800 C, it
N grains. In the case of heat treatment at 800 C, it was inferred from the tensile curve that the structure from the base metal, HAZ, and weld metal was almost homogenized. Figure 10 shows yield strengths, tensile strengths, and elongations below numerous conditions. The yield PSB-603 References strength and tensile strength of your GS-626510 web Welded specimen without the need of heat therapy had been the greatest. The base metal, HAZ, and weld metal heat-treated at 800 C had pretty much the identical worth. Within the case of elongation, HAZ and welded specimens without the need of heat treatment had the smallest value. In the case of elongation, HAZ and welded specimens without heat treatment had the smallest value. When heat-treated at 800 C, their elongations had been close for the degree of the base material.Table 1. Yield strength, tensile strength, and elongation price with the parent material. Item Specimen y (MPa) u (MPa) f Parent Material as Welded No. 1 364 522 24.0 No. two 363 524 23.9 No. three 366 524 23.4 Parent Material Heat Treated at 590 C No. 1 356 509 26.8 No. two 355 506 24.three No. three 354 511 28.7 Parent Material Heat Treated at 800 C No. 1 310 475 26.2 No. two 323 479 26.six No. three 322 482 25.Table 2. Yield strength, tensile strength, and elongation price of your HAZ material. Item Specimen y (MPa) u (MPa) f No. 1 366 529 25.1 HAZ as Welded No. 2 366 521 16.eight No. three 359 522 13.3 HAZ Heat Treated at 590 C No. 1 327 506 24.8 No. 2 335 511 24.eight No. 3 332 510 26.3 HAZ Heat Treated at 800 C No. 1 310 478 19.8 No. two 314 480 24.8 No. 3 305 478 19.Metals 2021, 11,8 ofTable 3. Yield strength, tensile strength, and elongation rate from the weld metal. Item Specimen y (MPa) u (MPa) f No. 1 442 549 13.1 Weld Metal as Welded No. two 449 557 11.3 No. three 448 568 19.0 Weld Metal Heat Treated at 590 C No. 1 385 520 15.9 No. two 413 549 21.three No. 3 393 535 21.9 Weld Metal Heat Treated at 800 C No. 1 327 483 28.9 No. two 329 486 26.four No. 3 327 481 19.Figure 7. Specimens soon after tensile tests.Figure eight. Strain-stress curve. (a) Parent material; (b) HAZ; and (c) weld metal.Figure 9. Comparison of tensile curves of parent, HAZ and weld metal. (a) Non PWHT (b) PWHT at 590 C; (b) PWHT at 590 C; (c) PWHT at 800 C.Metals 2021, 11,9 ofFigure ten. Comparison of yield stresses. P, parent material non heat treated; P5, parent heat treated at 590 C; P8, parent heat treated at 800 C; H, HAZ non heat treated; H5, HAZ heat treated at 590 C; H8, HAZ heat treated at 800 C; W, weld metal non heat treated; W5, weld metal heat treated at 590 C; W8, weld metal heat treated at 800 C. (a) Yield anxiety; (b) tensile tension; and (c) elongation rates.three.1.two. Microstructure and Hardness Figure 11 will be the Vickers hardness distribution in the base metal, HAZ, and weld metal measured on the surface in the weld specimen. Maximal Vickers hardness values were summarized in Table 4. Hardness values with the weld metal and HAZ had been greater than the base metal. When the specimens had been not heat-treated, or when specimens have been heat-treated at 590 C, hardness values on the weld metal and HAZ were 400 Hv greater than the base metal. When PWHT was carried out at 800 C, the base metal, HAZ, and weld metal had pretty much the same hardness value, and also the microstructures were far more homogenized. At the boundary between HAZ and also the weld metal, there was a point with greater hardness. That seems to become because of cementite inclusions current in the grain boundary. The hardness distribution is consistent with the impact of heat therapy on tensile strength, yield strength, and elongatio.
