Cold Cracking Sensitivity of a Newly Developed 9Cr2WVTa Steel

Wang, Jian; Lu, Shanping; Li, Yongkui; Hu, Qingxian; Liu, Rong; Li, Dianzhong

doi:10.1007/s11665-016-2432-6

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…In order to improve the corrosion/irradiation resistance, C and Si elements are added in high-chromium heat-resistant steels. However, high contents of alloying elements, such as Cr, C, Mn and Si, increase the hardening tendency of steel and eventually result in poor weldability, particularly the poor toughness of HAZs [4][5][6][7][8]. The heat-affected zone (HAZ) of high-chromium heat-resistant steel was usually believed to be the weakest region in a welded joint in respect of impact toughness, because of the quenched martensite and even δ-phase [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Impact Toughness of Heat-Affected Zones of 11Cr Heat-Resistant Steels

Jianxin

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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Aiming at the requirements of structural steel in Gen-IV nuclear reactor, the high-chromium martensitic heat-resistant steels containing 10-12% chromium were developed. The toughness of heat-affected zones (HAZs) is one of the important factors for evaluating the weldability of steels. In this paper, the simulated HAZs were fabricated using tempered SIMP steels. The effects of microstructures on the impact toughness of materials were analyzed using Vickers hardness tester, optical microscope, transmission electron microscope. Experimental results demonstrated that the HAZs of weldment were poor in toughness, much lower than that of the base metal. However, after experiencing post-weld heat treatment, the toughness of the HAZs increased greatly. The toughness became better in terms of CG-HAZ, FG-HAZ and IC-HAZ for the two steels, regardless of as-welded or after PWHT. Compared with SIMP7 steel, chemical compositions, such as C, Si, Mn and Cr, were adjusted to a lower content; the toughness of base metal and simulated HAZs was better in the case of SIMP11. The conjunct roles of dislocation density and carbon contents retained in the martensite led to poor impact toughness of the aswelded HAZs, because dislocations and carbon atoms affected the inner stresses within lattices.

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Section: Introductionmentioning

confidence: 99%

Impact Toughness of Heat-Affected Zones of 11Cr Heat-Resistant Steels

Jianxin

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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Investigation of Grain Misorientation on Creep Void Nucleation in P91 Heat-Resistant Steel by Experimentation and Crystal Plasticity Simulation

Wang,

Li,

et al. 2024

J. of Materi Eng and Perform

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The influence of welding heat input on the quality and properties of high strength low-alloy dissimilar steel butt joints

Tomków

Haras

2020

Weld. Tech. Rev.

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The paper presents the results of non-destructive and destructive tests od dissimilar high-strength low-alloy S460ML and S460N butt joints. These steels are characterized by similar mechanical properties, but their carbon equivalent CeIIW is much different. The joints were made using different values of heat input for each welding bead. They were tested by non-destructive methods: visual, penetrant, radiographic and ultrasonic tests. Then, the destructive tests were made: static tensile test, bending test, impact test and Vickers HV10 hardness measurements. The results of prepared examinations showed, that welding with higher heat input has significant impact on the mechanical properties of the dissimilar steel joints – the joint welded with bigger heat input was characterized by better mechanical properties.

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Cold Cracking Sensitivity of a Newly Developed 9Cr2WVTa Steel

Cited by 3 publications

References 17 publications

Impact Toughness of Heat-Affected Zones of 11Cr Heat-Resistant Steels

Impact Toughness of Heat-Affected Zones of 11Cr Heat-Resistant Steels

Investigation of Grain Misorientation on Creep Void Nucleation in P91 Heat-Resistant Steel by Experimentation and Crystal Plasticity Simulation

The influence of welding heat input on the quality and properties of high strength low-alloy dissimilar steel butt joints

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