On Characteristics of DP600 Resistance Spot Welds

Milititsky, Marcio; Pakalnins, Eric; Jiang, Canhua; Thompson, Andrew

doi:10.4271/2003-01-0520

Cited by 11 publications

(10 citation statements)

References 7 publications

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“…Despite corrosion protection, zinc coatings on steel are prone to liquid metal embrittlement (LME) during hightemperature manufacturing processes such as hot press forming, hot-dip galvanizing, and resistance spot welding (RSW) (Refs. [3][4][5][6]. Zinc-assisted LME is the penetration of liquid zinc into the steel matrix through grain boundaries of a susceptible microstructure aided by tensile stress, causing grain boundary decohesion and cracking in the steel.…”

Section: Introductionmentioning

confidence: 99%

Four Types of LME Cracks in RSW of Zn-Coated AHSS

Murugan¹,

Park²,

Vijayan³

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Four Types of LME Cracks in RSW of Zn-Coated AHSS

Murugan¹,

Park²,

Vijayan³

et al. 2020

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“…Milititsky eta!. [ 40] investigated the metallurgical features and formation of imperfections in DP600 spot welds. They found no heat-affected zone (HAZ) softening for DP600, as shown in Figure 2.16.…”

Section: Microhardness Testmentioning

confidence: 99%

Microstructural characterization and mechanical properties of spot welded dissimilar advanced high strength steels

Khan¹

2021

Preprint

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“…In particular, it is known that interfacial fracture (IF), which is considered to be a failure in the weld of mild steel, is easily caused by hard and brittle martensite, which is formed in the weld because of the high carbon equivalent (C eq ) [6,7]. Although research on double impulse, post weld, and temper control has been conducted in order to solve this problem, these methods have restricted applicability in industrial fields [8,9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of weldability for resistance spot welded single-lap joint between GA780DP and hot-stamped 22MnB5 steel sheets

et al. 2011

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Recently, in the automotive industry, Al-coated boron steel sheets (22MnB5) have been used for hot stamping, and the use of these sheets makes it possible to achieve a tensile strength of over 1,500 MPa, since a metallurgical transformation from austenite to martensite occurs during the process. In this study, resistance spot welding (RSW) experiments were performed in order to evaluate the weldability of single-lap joints between GA780DP and 22MnB5. The effect of the weld current on the nugget diameter and load-carrying capacity was evaluated by observing the nugget diameter and performing a tensile-shear test. Furthermore, the fracture behavior was evaluated by carrying out optical microscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) observations. Ductile regions were observed on the interfacially fractured surface of the weld, and this implies that a high load-carrying capacity can be obtained even when interfacial fracture (IF) occurs. IF is caused by the stress concentration resulting from the presence of the sharp notch at the boundary of the nugget as well as by the high hardness and the brittle microstructure of the weld; the microstructure is brittle because of the high carbon equivalent (C eq ) and the penetration of Al in the weld.

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On Characteristics of DP600 Resistance Spot Welds

Cited by 11 publications

References 7 publications

Four Types of LME Cracks in RSW of Zn-Coated AHSS

Four Types of LME Cracks in RSW of Zn-Coated AHSS

Microstructural characterization and mechanical properties of spot welded dissimilar advanced high strength steels

Evaluation of weldability for resistance spot welded single-lap joint between GA780DP and hot-stamped 22MnB5 steel sheets

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