Investigation of Plastic Behavior of Alloyed Steel Deformed During Martensitic Transformation

Kandrotaitė-Janutienė, R.; Baltušnikas, Arūnas

doi:10.1007/s11223-016-9813-9

Cited by 1 publication

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“…As the strength of steel increases, the plasticity and toughness of the steel is decreased correspondingly. According to the equal strength matching principle, the actual strength of the weld metal should be higher than the actual strength of the base high-strength metal after the welding process [10]. However, in terms of the toughness of the weld joint, the toughness of weld joint decreased accordingly [7].…”

Section: Introductionmentioning

confidence: 99%

Fracture Assessment of the Weld–Base Metal Interface of High-Strength Steel Weld Joint

Zhong

Liu

2018

Strength Mater

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The brittle fracture of the weld joint at low stresses is controlled by high-strength steel characteristics and welding defects. Based on fracture mechanics, the fracture behavior of the weldbase metal interface of a high-strength steel weld joint was studied to reveal the critical locations of the latter. From tensile fracture experiments of 45 steel welded specimens, the load-displacement curve and the fracture modes of weld joints were obtained. The results indicate that the critical loads and fracture modes are influenced by the crack slope angle. The maximum load of interface fracture in weld joints is less than that of the failure in the base metal mainly related to the existence of initial defects in the weld joint. The fracture surface morphology was also detected. It is considered that the fracture surface is influenced by different fracture locations and different microstructure of the weld and base metals. In addition, the critical stress intensity factors of a weld interface crack were calculated based on the critical load and the finite element linear extrapolation method. The linear fracture assessment criteria were proposed, which will be applicable to safety evaluation for the weld joints of high-strength steel structures.

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Section: Introductionmentioning

confidence: 99%