Failure mode transition in similar and dissimilar resistance spot welds of HSLA and low carbon steels

2012 ◽  
Vol 51 (1) ◽  
pp. 67-74 ◽  
Author(s):  
M Pouranvari
Keyword(s):  
Failure Mode ◽  
Carbon Steels ◽  
Mode Transition ◽  
Low Carbon ◽  
Spot Welds ◽  
Low Carbon Steels ◽  
Resistance Spot ◽  
Failure Mode Transition ◽  
Resistance Spot Welds

scholarly journals Effect of weld nugget size on failure mode and mechanical properties of microscale resistance spot welds on Ti–1Al–1Mn ultrathin foils

2018 ◽  
Vol 10 (7) ◽  
pp. 168781401878528 ◽  
Author(s):  
Feng Chen ◽  
Shiding Sun ◽  
Zhenwu Ma ◽  
GQ Tong ◽  
Xiang Huang
Keyword(s):  
Mechanical Properties ◽  
Failure Mode ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Weld Nugget ◽  
Interfacial Failure ◽  
Spot Welds ◽  
Resistance Spot ◽  
Resistance Spot Welds ◽  
Pullout Failure

We use tensile–shear tests to investigate the failure modes of Ti–1Al–1Mn microscale resistance spot welds and to determine how the failure mode affects the microstructure, microhardness profile, and mechanical performance. Two different failure modes were revealed: interfacial failure mode and pullout failure mode. The welds that fail by pullout failure mode have much better mechanical properties than those that fail by interfacial failure mode. The results show that weld nugget size is also a principal factor that determines the failure mode of microscale resistance spot welds. A minimum weld nugget size exists above which all specimens fail by pullout failure mode. However, the critical weld nugget sizes calculated using the existing recommendations are not consistent with the present experimental results. We propose instead a modified model based on distortion energy theory to ensure pullout failure. Calculating the critical weld nugget size using this model provides results that are consistent with the experimental data to high accuracy.

Prediction of the failure mode of automotive steels resistance spot welds

2020 ◽  
Vol 25 (6) ◽  
pp. 511-517
Author(s):  
Mohsen Sheikhi ◽  
Shaghayegh Jaderian ◽  
Yousef Mazaheri ◽  
Majid Pouranvari
Keyword(s):  
Failure Mode ◽  
Spot Welds ◽  
Resistance Spot ◽  
Resistance Spot Welds

Resistance Spot Welding of Low Carbon Steel to Austenitic CrNi Stainless Steel

2014 ◽  
Vol 875-877 ◽  
pp. 1499-1502 ◽  
Author(s):  
Ladislav Kolařík ◽  
Miroslav Sahul ◽  
Marie Kolaříková ◽  
Martin Sahul ◽  
Milan Turňa
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Weld Joint ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Spot Welds ◽  
Resistance Spot ◽  
Resistance Spot Welds

The contribution deals with resistance spot welding of low carbon steel to austenitic CrNi stainless steel. The thickness of welded dissimilar steels was 2 mm. DeltaSpot welding gun with process tape was utilized for welding of the above-mentioned combination of steels. Resistance spot welds were produced under different welding currents. The welding currents used were 7 kA, 7.5 kA and 8 kA, respectively. Optical microscopy, microhardness measurement across the weld joint and EDX analysis across the weld joint interface were used to evaluate the quality of resistance spot welds of dissimilar steels.

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