The relationship between fracture toughness and tensile property in high-strength steels

Li, H.F.; Wei, Jiafu; Yang, Shaopu; Liu, Yongqiang

doi:10.1016/j.engfailanal.2021.105854

Cited by 17 publications

(3 citation statements)

References 51 publications

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“…The uneven distribution of strength on the DMWJ was attributed to changes in microstructure. The relationship between the microstructure, strength, and fracture toughness of metal materials [38,39], as well as the microstructures in Figures 7-14 and strength distributions in Figure 15, revealed unevenly distributed fracture toughness along the DMWJ. For BM-1 and BM-2 with uniform microstructures, the fracture toughness remained unchanged.…”

Section: Inhomogeneity Of Fracture Toughness In Dmwjmentioning

confidence: 93%

Fracture Toughness of Different Region Materials from a Dissimilar Metal Welded Joint in Steam Turbine Rotor

Wang

2022

Coatings

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This study systematically evaluated the fracture toughness of a CrMoV/NiCrMoV dissimilar metal welded joint (DMWJ) with buttering layer technology in a steam turbine rotor . The fracture resistance curves and parameters of base metals (BM-1 and BM-2), weld metal (WM), buttering layer (BL), and heat-affected zones (HAZ-1 and HAZ-2) in the welded joint were all obtained. The characteristic microstructures, carbides, and fracture surfaces were observed by optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results revealed a different fracture toughness of each region in the DMWJ. The BM-1 showed a brittle fracture mode, mainly related to the directional needle-shaped carbide M3C. However, HAZ-1, BL, WM, HAZ-2, and BM-2 illustrated ductile fracture mode. The tempered microstructure and dispersed carbides increased the toughness of each material. Except for BM-1, the ductile fracture toughnesses of BL and WM were low in DMWJ due to coarse spherical carbide M7C3. The fracture toughness in the middle of HAZs was higher than that of the corresponding BMs owing to the fine tempered martensite and bainite. The fracture toughness along DMWJ appeared uneven. In sum, these findings look promising for the accurate integrity evaluation of DMWJs.

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Section: Inhomogeneity Of Fracture Toughness In Dmwjmentioning

confidence: 93%

Fracture Toughness of Different Region Materials from a Dissimilar Metal Welded Joint in Steam Turbine Rotor

Wang

2022

Coatings

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“…The average measured material properties for ordinary steel and high-strength bolts are listed in Table 2 . E 0 is the initial Young's modulus, E 0 is the elastic modulus; σ y and σ 0.2 are the yield strengths of ordinary steel and high-strength bolts, respectively [ 47 ]; σ u is the ultimate tensile strength; ε y ( ε 0.2 ) and ε u are the corresponding yield strain and ultimate strain; ε f is the elongation at fracture. The ratio of ultimate tensile stress to yield strength ( σ u / σ y or σ 0.2 ) for ordinary steel and high-strength bolts is observed to be 1.5 and 1.2, respectively, indicating that ordinary steel has more significant strain hardening capacity.…”

Section: Experimental Programmentioning

confidence: 99%

Evolution characteristics and performance evaluation of extended end-plate joints with single and double side connections under cyclic loading

Luo,

Sun,

et al. 2024

Heliyon

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“…The numerical value of the fracture toughness was indirectly obtained through the J-integral method. Li et al [ 24 ] studied the fracture toughness of high-strength steel through three-point bending tests and proposed a relationship between fracture toughness and macro tensile parameters. The fracture toughness and tensile strength exhibited an inverse relationship.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Fracture Toughness of Bamboo Scrimber

Zhang

Hou

et al. 2023

Materials

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In the past decade, bamboo scrimber has developed rapidly in the field of building materials due to its excellent mechanical properties, such as high toughness and high tensile strength. However, when the applied stress exceeds the ultimate strength limit of bamboo scrimber, cracks occur, which affects the performance of bamboo scrimber in structural applications. Due to the propensity of cracks to propagate, it reduces the load-bearing capacity of the bamboo scrimber material. Therefore, research on the fracture toughness of bamboo scrimber contributes to determining the material’s load-bearing capacity and failure mechanisms, enabling its widespread application in engineering failure analysis. The fracture toughness of bamboo scrimber was studied via the single-edge notched beam (SENB) experiment and compact compression (CC) method. Nine groups of longitudinal and transverse samples were selected for experimental investigation. The fracture toughness of longitudinal bamboo scrimber under tensile and compressive loadings was 3.59 MPa·m1/2 and 2.39 MPa·m1/2, respectively. In addition, the fracture toughness of transverse bamboo scrimber under tensile and compressive conditions was 0.38 MPa·m1/2 and 1.79 MPa·m1/2, respectively. The results show that, for this material, there was a significant distinction between longitudinal and transverse. Subsequently, three-point bending tests and simulations were studied. The results show that the failure mode and the force–displacement curve of the numerical simulation were highly consistent compared with the experimental results. It could verify the correctness of the test parameters. Finally, the flexural strength of bamboo scrimber was calculated to be as high as 143.16 MPa. This paper provides data accumulation for the numerical simulation of bamboo scrimber, which can further promote the development of bamboo scrimber parameters in all aspects of the application.

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The relationship between fracture toughness and tensile property in high-strength steels

Cited by 17 publications

References 51 publications

Fracture Toughness of Different Region Materials from a Dissimilar Metal Welded Joint in Steam Turbine Rotor

Fracture Toughness of Different Region Materials from a Dissimilar Metal Welded Joint in Steam Turbine Rotor

Evolution characteristics and performance evaluation of extended end-plate joints with single and double side connections under cyclic loading

Experimental Study on the Fracture Toughness of Bamboo Scrimber

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