Effect of low temperature exposure on impact characteristics of epoxy bonded high strength steels

Hybrid weld-adhesive bonding (AB) was used as an approach to improve the mechanical properties of martensitic stainless steel resistance spot welds. The weld fusion zone in both techniques was composed of predominantly martensite and δ-ferrite. It was found that the presence of adhesive does not induce excess hardening effect in the fusion zone. It was shown that hybrid AB/resistance spot welding) i.e. weld-bonding) technique can double the peak load and energy absorption of the joints compared to those of the resistance spot welds. To obtain high performance weld-bonded joints, heat generation during welding should be controlled to produce weld bonds with large fusion zone size, but without detrimental effect on the adhesive strength.

Section: Introductionmentioning

confidence: 99%

Mechanical properties of martensitic stainless steel weld/adhesive hybrid bonds

Pouranvari

Safikhani

2018

“…Among the various joining methods, adhesive bonding is increasingly used in automobile manufacturing. [1][2][3] Adhesively bonded joints are trending alternatives for mechanical joints in engineering applications that provide many advantages over conventional mechanical seals. Using adhesive bonding for joining composite parts provides many advantages such as low cost, high strength/weight ratio, low stress concentration, fewer processing requirements and superior fatigue and environmental resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanofillers on adhesion strength of steel joints bonded with acrylic adhesives

Yadollahi

Barkhordari

Gholamali

et al. 2015

This paper reports a study on the effect of Al 2 O 3 , SiO 2 and TiO 2 nanoparticles on the adhesion strength of steel joints bonded with two-part structural acrylic adhesives. Introduction of the nanoparticles in the two-part acrylic adhesive led to a remarkable enhancement in both the shear and the tensile strength of the steel joints. Addition of the nanoparticles caused an increase in the shear and the tensile strength of the joints; however, a reduction was observed in the peel strength of the joints. Differential scanning calorimeter analysis revealed that glass transition temperature values of the adhesives rose with the addition of the nanofillers. The water contact angle was decreased for adhesives containing nanoparticles. Scanning electron microscope images revealed that the addition of the nanoparticles altered the fracture morphology from smooth to rough fracture surfaces.

“…The development of high strength steel joints has paramount research significance owing to its immense demand in various small scale and complex structures used for automobile and aircraft industries. Regarding this, different joining methods like epoxy bonding,1 friction stir processing,2 adhesive bonding,3 tungsten inert gas welding4 and brazing5 are applicable in manufacturing engineering. Among these methods, brazing is favoured for the fabrication of multichannel metallic structures of plate fin heat exchanger (PFHE) system.…”

Section: Introductionmentioning

confidence: 99%

Development of high strength stainless steel brazed joints using rapidly solidified filler alloys

Roy

Bapari

Panda

et al. 2013

Two types of rapidly solidified filler alloys of nominal composition Cu-40Mn-10Ni (C50) and Ni-7Cr-3?2B-4?5Si-3Fe (N82) were used for stainless steel (SS304) brazing joints. The C50 foil is crystalline in nature, whereas N82 foil shows amorphous structure. The SS304/C50/SS304 joint shows solid solution phases at interfacial area, with maximum bond strength of 500 MPa, which qualifies to 80% of base metal strength. Conversely, the SS304/N82/SS304 joint develops brittle Cr x B y intermetallic phases, which lowers bond strength to 330 MPa.