Hot cracking in stainless steel 310s, numerical study and experimental verification

Safari, Athar; Forouzan, Mohammad Reza; Shamanian, M.

doi:10.1016/j.commatsci.2012.06.015

Cited by 21 publications

(11 citation statements)

References 14 publications

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“…Up to date, parameters such as mechanical strain, 22,24,25,35 plastic strain 23 and plastic strain rate 26,27 have been used to analyse the crack initiation. In this study, the mechanical strain was adopted to analyse the solidification cracking behaviour.…”

Section: Evolution Of Mechanical Strain During Weldingmentioning

confidence: 99%

Experimental and numerical analysis of solidification cracking behaviour in fibre laser welding of 6013 aluminium alloy

Wang

et al. 2015

Science and Technology of Welding and Joining

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Experimental observation and numerical modelling were employed to investigate the solidification cracking behaviour during fibre laser welding of 6013 aluminium alloy. The solidification cracking initiation location and propagation path were studied using a high speed camera system and via metallurgical analysis. A three-dimensional thermomechanical finite element model of fibre laser welding of aluminium alloys was developed, which considered cylindrical volumetric heat source, temperature dependent material properties, solidification shrinkage and stress relaxation in the weld molten pool. The transient evolution and distribution of mechanical strain in the brittle temperature range (BTR) were analysed in detail to find the factors which drove the crack initiation and propagation. The results showed that the solidification cracking initiated near the fusion line and then propagated along the centreline of the weld, which was the result of the strain distribution characteristic in BTR.

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Section: Evolution Of Mechanical Strain During Weldingmentioning

confidence: 99%

Experimental and numerical analysis of solidification cracking behaviour in fibre laser welding of 6013 aluminium alloy

Wang

et al. 2015

Science and Technology of Welding and Joining

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“…It is often formed at a location of stress concentration associated with a sudden change in the transversal cross section or hot spots due to the obstructed contraction of the solidifying material. In recent years, many studies have been conducted to investigate the hot tearing susceptibility (HTS) and the underlying mechanisms of the different alloy systems, such as steel, Al alloys, and Mg alloys …”

Section: Introductionmentioning

confidence: 99%

Hot Tearing Susceptibility of Binary Mg–Gd Alloy Castings and Influence of Grain Refinement

et al. 2018

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The hot tearing susceptibility (HTS) of binary Mg-Gd alloys is tested from 1.0 to 8.0 wt% using a constrained rod casting (CRC) mold. It is found that the curve of the HTS versus Gd content follows a typical "Λ" curve: HTS increases firstly, reaches a maximum at 1.5% Gd, and then decreases, which is in good agreement with the results predicted by Clyne-Davies model. Microstructure observations and thermodynamic calculations show that grain structure (size and morphology), the susceptible freezing range, the volume fraction of eutectic liquid, and the amount of intermetallics (Mg 5 Gd) are the main factors influencing the HTS of Mg-Gd experimental alloys. The highest HTS observed in Mg-1.5Gd alloy is attributed to its coarse columnar grains, the high freezing range, and the thin and continuous liquid film as well as the hard and brittle intermetallics precipitated along the grain boundaries. In contrast, the lowest HTS observed in Mg-8Gd alloy is mainly related to the fine equiaxed grains, which can effectively accommodate the strain during solidification, and the tear healing by eutectic liquid. Furthermore, the effect of grain refinement by Zr addition on the HTS is also studied, and the results show that grain refinement can significantly reduce the HTS.

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“…Safari [15] implements a visco-plastic constitutive model into a finite element simulation. A maximum transverse mechanical strain criterion for both initiation and propagation of hot cracking is determined.…”

Section: Introductionmentioning

confidence: 99%

Investigation on hot cracking during laser welding by means of experimental and numerical methods

et al. 2017

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Hot cracking during laser welding of Transformation Induce Plasticity (TRIP) steel at the edges of steel flanges can be a problem. In this study, modified hot cracking tests were performed by welding on a single-side clamped specimen at various distances from the free edge, while the heat input and external constraints remained constant. In situ temperature and strain measurements were carried out using pre-attached thermocouples and digital image correlation, respectively. A thermal-mechanical finite element (FE) model was constructed and validated with the temporal and spatial data measured. From the validated FE model, the temperature and strain evolution in the weld mushy zone were studied. A critical strain for the onset of hot cracking in the TRIP steel examined was found to be in the range of 3.2 to 3.6%. This threshold was further evaluated and experimentally confirmed by welding with different heat inputs.

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Hot cracking in stainless steel 310s, numerical study and experimental verification

Cited by 21 publications

References 14 publications

Experimental and numerical analysis of solidification cracking behaviour in fibre laser welding of 6013 aluminium alloy

Experimental and numerical analysis of solidification cracking behaviour in fibre laser welding of 6013 aluminium alloy

Hot Tearing Susceptibility of Binary Mg–Gd Alloy Castings and Influence of Grain Refinement

Investigation on hot cracking during laser welding by means of experimental and numerical methods

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