Microstructure based modeling of deformation and failure of spot-welded advanced high strength steels sheets

Paveebunvipak, K.; Uthaisangsuk, Vitoon

doi:10.1016/j.matdes.2018.09.052

Cited by 40 publications

(11 citation statements)

References 28 publications

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“…During resistance spot welding, molten hightemperature austenite is rapidly cooled. (about 2000 oC/s) During the formation of nugget, the temperature curve will directly cross the martensite transformation critical region, and different contents and distribution of martensite will be produced in the nugget [12]. These martensites will make the nuclear hardness becomes higher and the brittleness increases.…”

Section: Uvodmentioning

confidence: 99%

“…Za vreme elektrootpornog tačkastog zavarivanja, tečan visoko temperaturni austenit se brzo hladi brzinom od oko 2000 oC/s. Za vreme formiranja sočivastog šava, temperaturna kriva direktno prolazi kroz kritičnu oblast martenzitne transformacije i različita količina i raspodela martenzita nastaje u spoju [12]. Ovaj martenzit daje povišenje tvrdoće i krtosti.…”

Section: Uvodunclassified

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Effect of post-weld tempering treatment on performance of DP600 spot welded joint

Li¹,

Liu²,

Wang³

et al. 2021

Zavariv zavar konstrukcije

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In order to meet the increasing requirements of the automotive industry for material strength grades and performance, the application of advanced highstrength steel automotive panels, represented by dual-phase steel, in lightweight vehicle bodies is increasing. Resistance spot welding is the main joining process for vehicle body manufacturing. How to improve the tensile strength and fatigue performance of dual-phase steel resistance spot welding joints is of great significance to the welding structure of the body. In this paper, resistance spot welding of cold rolled DP600 dual phase steel in the welding current range of 9000A-12000A was carried out. The effects of post-weld tempering treatment on microstructure, microhardness, shearing and fatigue of joints were compared. The results show that the microstructure transformation occurs in the weld nugget area after post-weld tempering, and the tempered martensite appears to reduce the microhardness of the weld nugget area; the nugget diameters, tensile-shear strength and failure energy are all higher than those without tempering treatment; tempering improves the fatigue strength of the spot joints, and regardless of whether the welded joints are tempered, cracks are all generated near the heat affected zone of the joint after fatigue test.

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Section: Uvodmentioning

confidence: 99%

Section: Uvodunclassified

Effect of post-weld tempering treatment on performance of DP600 spot welded joint

Li¹,

Liu²,

Wang³

et al. 2021

Zavariv zavar konstrukcije

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“…Moreover, the circumference (HAZ/WM) of spot-welds could be damaged by bent cracks, which can be along the boundary of HAZ/WM or HAZ/BM (stage II fracture). A similar approach is performed by Paveebunvipak et al [17], in their study, a FE simulations of tensile-shear and cross tension tests of welded specimens were carried out for the examined steels, in which the determined stress-strain curves and fracture loci for the individual weld regions were defined. The force-displacement curves up to fracture, and the simulations coupled with varying mechanical and damage properties of each weld area could accurately predict occurred fracture developments from the experiments.…”

Section: Fe Predictions From Spot-welded Joints Modelsmentioning

confidence: 99%

Failure mode prediction of resistance spot welded quenching and partitioning stainless steel

Chebbi

Tlili

Bouzaiene

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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This paper presents an experimental and numerical study, carried out in order to develop knowledge about the assembly mechanical behavior of two spot-welded austenitic stainless steel (AISI 304) sheets. The assembly is subjected to a quasistatic tensile loading. Thus, the surface response methodology is used to evaluate the effects of the main welding parameters for an optimal improvement of the weldment mechanical strength. Regression analysis (statistical optimization) was applied to evaluate the behavior of welded joints under different stresses, necessary to predict the optimal parameters of the welding process, and to quantify the impact of various types of loading on welded joint damage. Using the desirability function, with a maximum of 98%, optimal multi-objective analysis predicted the optimal parameters (I, D and t) leading to maximum tensile-shear and tensile-peel of the weldment. The developed FEM proved to be effective in characterizing the tensile strength and deducing the type of damage to the spot-welded structure. This study makes it possible to meet several industrial requirements in order to improve the impact resistance of light vehicles.

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“…However, it is far from sufficient to ensuring a safe and reliable design purely based on the static mechanical analysis although that is necessary, the fatigue damage of RSW joints is a significant issue to be addressed [14]. A lot of efforts have been made on sheet steels with various strength levels [15][16][17][18][19][20][21]. It is interesting that Wang et al [15] found that the fatigue performance was approximately the same for both QP980 (UTS 980 MPa grade quenching and partitioning steel) and DP780 (UTS 780 MPa grade dual-phase steel) RSW joints with a similar geometric factor, although the former one had better combination of strength and ductility.…”

Section: Pfmentioning

confidence: 99%

Tensile-shear fracture behaviour of resistance spot-welded hot stamping sheet steel with Al–Si coating

Tan

Hong

Lei

et al. 2020

Science and Technology of Welding and Joining

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Resistance spot welding (RSW) process with protective coatings on advanced high-strength steels is a challenge. An ultimate tensile strength (UTS)1500 MPa grade hot stamping sheet steel(22MnB5) with Al-Si coating was employed for the RSW process in the present study. The effects of Al-Si coating on the microstructure of RSW joints and tensile-shear fracture behaviour were investigated. Strip-like Fe-(Al,Si) cladding on the surface of nugget tongues acted as the crack source and initiated the fracture. Two types of fatigue failure mode were observed: nugget pull-out with tearing of base material (BM) and eyebrow-shaped fracture along the BM width direction, corresponding to high and low loading levels, respectively. All fatigue fracture cracks were found to be originated along the Fe-(Al,Si) strip through the heat-affected zone.

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Microstructure based modeling of deformation and failure of spot-welded advanced high strength steels sheets

Cited by 40 publications

References 28 publications

Effect of post-weld tempering treatment on performance of DP600 spot welded joint

Effect of post-weld tempering treatment on performance of DP600 spot welded joint

Failure mode prediction of resistance spot welded quenching and partitioning stainless steel

Tensile-shear fracture behaviour of resistance spot-welded hot stamping sheet steel with Al–Si coating

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