Adhesive Bonding Performance of GA Coated 590 MPa Tensile Strength Steels ArcelorMittal USA

Format:

Conference/Event

Author/Creator:

Wolf, Wolf, author.

Contributor:

Bandekar, Jagdeesh

Cheng, Chann

Chintamani, Jayanth

Golden, Michael

Yan, Benda

Conference Name:

SAE 2011 World Congress & Exhibition (2011-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

Advanced high strength steels (AHSS) are becoming major enablersfor vehicle light weighting in the automotive industry. Crashresistant and fracture-toughened structural adhesives have shownpotential to improve vehicle stiffness, noise, vibration, andharshness (NVH), and crashworthiness. They provide weight reductionopportunity while maintaining crash performance or weight increaseavoidance while meeting the increasing crash requirement.Unfortunately, the adhesive bonding of galvanneal (GA)-coatedsteels has generally yielded adhesive failures with the GA coatingpeeling from the steel substrate resulting in poor bond strength. Alimited study conducted by ArcelorMittal and Dow Automotive in 2008showed that GA-coated AHSS exhibited cohesive failure, and goodbond strength and crash performance. In order to confirm thereliable performance, a project focusing on the consistency of theadhesive bond performance of GA-coated steels of 590 MPa strengthlevel was initiated. The 590 MPa steels include 590R (complexphase, high yield to tensile ratio), 590Y (dual phase (DP)), and590T (transformation-induced plasticity (TRIP)). Adhesive bondingwas evaluated by lap shear tests at room temperature at DowAutomotive and ArcelorMittal Global R&D-East Chicago. Bondswere made with a crash-resistant structural adhesive, BETAMATE1488. Additionally, the 590 MPa steels were evaluated after bondingwith BETAMATE 1022DUS, a fracture-toughened structural adhesive,and BETAMATE 73305GB, a conventional, structural, hem-flangeadhesive, to demonstrate the performance of adhesives withdifferent moduli of elasticity. Lap shear testing was alsoconducted on GA-coated interstitial-free (IF), extra deep drawingsteels (EDDS), bonded with the three adhesives, to determine if lapshear performance of GA EDDS can be improved with the newgeneration adhesives. X-ray diffraction (XRD) was used to measurethe residual stress at the interface between the zinc coating andsteel substrate as an indication of the interface bonding. Thispaper describes the results of this testing and demonstrates thatcrash-resistant structural adhesives can provide consistently goodbonding for GA-coated AHSS and thus be used to reduce weight whilemaintaining or improving crash performance

Notes:

Vendor supplied data

Publisher Number:

2011-01-1052

Access Restriction:

Restricted for use by site license