Performance Evaluation of Prephosphated Galvannealed Steel Sheet for Automotive Applications

High strength 2024 aluminum alloy studs were joined to galvanized, galvannealed and non-coated steel sheets by using an advanced stud welding method. Effect of the coating layer on the interfacial microstructure and the tensile fracture load of the joints were evaluated. A specially-designed stud having a circular projection at its bottom was pressed against a sheet surface. A discharge current was introduced from the upper part of the stud. Local heating could be achieved by a high current density at a contact point between the projection and sheet. The observation of joint area revealed the projection was severely deformed and spread along the sheet surface. The coating layer of the galvanized steel sheet was removed at the joint interface under the charging voltage of 200 V, while that of the galvannealed one locally remained on the steel surface even at 400 V. This would be strongly related to the melting or liquidus and solidus temperatures of each coating layer. Joining was not achieved at a low charging voltage in the non-coated and galvannealed steel sheets, while high tensile fracture load was obtained even at 200 V in the galvanized ones.

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Improvement of fatigue strength of lap fillet joints by using tandem MAG welding in a 590-MPa-grade galvannealed steel sheet

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-017-0828-6 ◽

2017 ◽

Vol 93 (9-12) ◽

pp. 4379-4387 ◽

Cited By ~ 2

Author(s):

Dong-Yoon Kim ◽

Dongcheol Kim ◽

Munjin Kang ◽

Young-Min Kim

Keyword(s):

Fatigue Strength ◽

Steel Sheet ◽

Mag Welding ◽

Galvannealed Steel

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Performance evaluation of cellulose nanofiber reinforced polypropylene biocomposites for automotive applications

Biocomposite and Synthetic Composites for Automotive Applications ◽

10.1016/b978-0-12-820559-4.00007-9 ◽

2021 ◽

pp. 199-215

Author(s):

Mohd Nor Faiz Norrrahim ◽

T.A.T. Yasim-Anuar ◽

M.A. Jenol ◽

N. Mohd Nurazzi ◽

S.M. Sapuan ◽

...

Keyword(s):

Performance Evaluation ◽

Cellulose Nanofiber ◽

Automotive Applications

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Performance Evaluation of Stereo Algorithms for Automotive Applications

Lecture Notes in Computer Science - Computer Vision Systems ◽

10.1007/978-3-642-04667-4_29 ◽

2009 ◽

pp. 285-294 ◽

Cited By ~ 25

Author(s):

Pascal Steingrube ◽

Stefan K. Gehrig ◽

Uwe Franke

Keyword(s):

Performance Evaluation ◽

Automotive Applications

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Manufacturing of one-side galvanized and galvannealed steel sheet by masking coat.

Transactions of the Iron and Steel Institute of Japan ◽

10.2355/isijinternational1966.23.939 ◽

1983 ◽

Vol 23 (11) ◽

pp. 939-945 ◽

Cited By ~ 1

Author(s):

Shigeru KOBAYASHI ◽

Hideo KOUMURA ◽

Makoto HIMENO ◽

Toshio IRIE ◽

Yoshinori FUJITA ◽

...

Keyword(s):

Steel Sheet ◽

Galvannealed Steel

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Effect of Surface Morphology and Microstructure on Powdering Resistance Performance of GA Coatings with Different Aluminum Contents

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.940.41 ◽

2014 ◽

Vol 940 ◽

pp. 41-45

Author(s):

Xun Hua Yuan ◽

Chun Yu Qi ◽

Qi Fu Zhang

Keyword(s):

Surface Morphology ◽

Surface Coating ◽

Steel Sheet ◽

X Ray Diffraction ◽

X Ray ◽

Inhibition Effect ◽

Al Content ◽

Resistance Performance ◽

Galvannealed Steel ◽

Effect Of Surface

The surface morphology and microstructure of galvannealed steel sheet (GA) coatings prepared at different galvannealing parameters were analyzed by X-ray diffraction and SEM, and powdering amount of GA coating was investigated by the double-Olsen powdering tester. The results show that when the Al contents below 0.16 wt%, the Ra of GA coating surface was measured namely below 1.0 μm, and powdering amount of GA coating was below 30 mg/m2, it is within a reasonable value required by automotive makers. After that with the Al contents increased in zinc liquid the amount of powdering increased, this means that the powdering resistance performance of GA coating not only depended on the iron content in the coating, but depended on the roughness profiles of the surface coating. When the galvanizing coating with 0.22 wt% Al content and galvannealing at 500 °C, with the inhibition effect of Fe2Al5Znxinhibit layer, the thickness of δ1k-phase was different in the GA coating, which deteriorated the powdering resistance performance of GA coating.

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