Low-temperature impact toughness of laser–arc hybrid welded low-carbon bainitic steel

Su, Rui; Chen, Jintao; Chen, Hui; Zhang, Zhiyi; Zhao, Xu; Lei, Zheng; Wang, Dirui; Meng, Yunfei; Zhang, Zhenlin

doi:10.1007/s10853-023-08765-0

Cited by 2 publications

(2 citation statements)

References 30 publications

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“…The M/A microstructure, characterized by its brittleness, can induce high-stress concentrations under severe deformation, leading to cracking and debonding of the steel [ 15 ]. Furthermore, during impact fracture, the M/A boundary is often the site of crack initiation, which reduces the impact toughness of the material [ 16 ]. On the other hand, the M/A decomposition greatly improves the steel’s ductility and toughness [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Martensite/Austenite Decomposition during Tempering of Ultrafine Nano-Bainitic Steels

Qu,

Lei,

Chen

et al. 2024

Materials

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In this study, the decomposition of a martensite/austenite (M/A) microconstituent in bainitic steels was analyzed using differential scanning calorimetry (DSC) data in conjunction with Kissinger’s and Johnson–Mehl–Avrami–Kolmogorov (JMAK)’s formulas. In bainitic steel subjected to austempering heat treatment, the presence of an M/A microstructure adversely affects the mechanical properties. According to the kinetic equations derived, it is observed that after tempering the sample at 600 °C for 4000 s, the generation of each phase reaches its maximum. The SEM images taken before and after tempering reveal extensive decomposition of the M/A constituent in the microstructure. The proportion of the M/A microstructure decreased significantly from about 10% before tempering to less than 1% after. Additionally, the content of residual austenite also reduced nearly to zero. These observations are consistent with the predictions of the kinetic equations.

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Section: Introductionmentioning

confidence: 99%

Kinetics of Martensite/Austenite Decomposition during Tempering of Ultrafine Nano-Bainitic Steels

Qu,

Lei,

Chen

et al. 2024

Materials

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“…These materials include lowtemperature high-strength steel for ships, high-strength steel for cryogenic vessels, nonmetallic sealing materials suitable for low temperatures, coating materials that prevent ice formation, lightweight thermal insulation materials, and low-temperature cable materials [4]. Polar steel must retain its strength, toughness [5][6][7][8], and weldability [9][10][11][12][13] under extremely low temperatures. It must also be resistant to corrosion-induced degradation and loss of structural integrity.…”

Section: Introductionmentioning

confidence: 99%

Current Status and Trends of Low-Temperature Steel Used in Polar Regions

Xiao,

Xie,

et al. 2024

Materials

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The desire to explore the natural resources and geopolitical patterns of the North and South Poles has significantly increased the interest of experts and researchers in the development and utilization of the polar regions. In this article, we comprehensively analyzed the current state of the development of polar low-temperature steel around the world. We highlighted the challenges that must be addressed in the ongoing development efforts and summarized the expected future trends in this field. The main theme of this article involves the challenges encountered in polar environments primarily caused by the low-temperature toughness and seawater corrosion of marine steel.

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Low-temperature impact toughness of laser–arc hybrid welded low-carbon bainitic steel

Cited by 2 publications

References 30 publications

Kinetics of Martensite/Austenite Decomposition during Tempering of Ultrafine Nano-Bainitic Steels

Kinetics of Martensite/Austenite Decomposition during Tempering of Ultrafine Nano-Bainitic Steels

Current Status and Trends of Low-Temperature Steel Used in Polar Regions

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