3D characterization of the propagation of liquid metal embrittlement inner cracks during tensile shear testing of resistance spot welds

Resistance spot welding is used extensively in auto industry. Every commercial vehicle has 4000-5000 spot welds. The weld ability, performance, and reliability are therefore important issues in design. Tensile-shear tests are normally performed to evaluate the weld quality and acquire the mechanical strength of spot welds. However, different industry test standards often specify different dimensions for the tensile-shear specimen. In this work, we investigate the failure load and energy absorption of the spot welds made of Q235 steel using tensile-shear specimens of different dimensions. The objective is (a) to determine a specimen dimension independent geometry for failure strength, and (2) to call attention to the deficiency of some of the test standards.

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Temperature field and microstructure characterization of AA6061/H70 dissimilar thermo-compensated resistance spot welds having different joint configurations

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2017.06.014 ◽

2017 ◽

Vol 28 ◽

pp. 336-342 ◽

Cited By ~ 2

Author(s):

Yu Zhang ◽

He Shan ◽

Zhen Luo ◽

Yang Li ◽

Jing Bi ◽

...

Keyword(s):

Temperature Field ◽

Microstructure Characterization ◽

Spot Welds ◽

Resistance Spot ◽

Resistance Spot Welds

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Effects of process parameters on tensile-shear strength and failure mode of resistance spot welds of AISI 201 stainless steel

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-016-9222-z ◽

2016 ◽

Vol 89 (5-8) ◽

pp. 1853-1863 ◽

Cited By ~ 5

Author(s):

M. Safari ◽

H. Mostaan ◽

H. Yadegari Kh. ◽

D. Asgari

Keyword(s):

Stainless Steel ◽

Shear Strength ◽

Failure Mode ◽

Process Parameters ◽

Tensile Shear Strength ◽

Tensile Shear ◽

Spot Welds ◽

Resistance Spot ◽

Resistance Spot Welds

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Resistance Spot Welding of Unequal Thickness Low Carbon Steel Sheets

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.83-86.1205 ◽

2009 ◽

Vol 83-86 ◽

pp. 1205-1211 ◽

Cited By ~ 3

Author(s):

Majid Pouranvari ◽

Pirooz Marashi

Keyword(s):

Carbon Steel ◽

Spot Welding ◽

Peak Load ◽

Low Carbon Steel ◽

Low Carbon ◽

Tensile Shear ◽

Spot Welds ◽

Resistance Spot ◽

Resistance Spot Welds ◽

Dissimilar Thickness

Resistance spot welding is the dominant process for joining sheet metals in automotive industry. Even-thickness combinations are rarely used in practice; therefore, there is clearly a practical need for failure behaviour investigation of uneven-thickness resistance spot welds. The aim of this paper is to investigate and analyze the failure mode and failure mechanism of dissimilar thickness low carbon steel resistance spot welds during tensile-shear overload test. Microstructural investigations, microhardness tests and tensile-shear tests were conducted. Mechanical properties of the joint were described in terms of peak load, energy absorption and failure mode. It was concluded that weld nugget size and the strength of the thinner base metal are the controlling factors of the peak load and energy absorption of dissimilar thickness spot welds.

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