Manufacturing and Fatigue Strength of Brazed, Locally Hardened Structures

Schram, A.; Masendorf, Rainer; Medhurst, Tim; Wiche, Henning

doi:10.1002/srin.200806344

Cited by 4 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First comparative studies showed that the fatigue strength of bilateral brazed joints is up to 40 % higher than laser-welded seams without filler material. Additionally they have a stress amplitude which has a five times higher survival probability of the brazed seams [4].…”

Section: Discussionmentioning

confidence: 99%

“…The advantages of hard-brazing include corrosion resistance, low distortion, and over all local material properties are hardly influenced, due to the low heat input. As a result the brazing process is appropriate for joining heat-sensitive and locally hardened structures [4,5]. These materials pass through a complex manufacturing process to get their locally defined properties.…”

mentioning

confidence: 99%

“…Mainly hardbrazed joints are qualified by static strength -tensile test -but normally not by fatigue testings. Fatigue strength is detected as add on at the end of investigations [4]. In particular, the behaviour of brazed structures of materials with locally altered properties under alternating stress cannot be appraised with conventional methods.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Low Heat Joining – Manufacturing and Fatigue Strength of Brazed, Locally Hardened Structures

Wesling

Schram

Kessler

2010

AMR

Self Cite

View full text Add to dashboard Cite

Abstract. Low-heat brazing as a joining option for high strength steel sheets under cyclic load is still a challenge for manufacturing. For application arc brazing to locally hardened, high strength steel sheets a material specific manufacturing concept is needed to ensure a quality-related, reliable and reproducible processing. Thus the interaction of brazing parameters, metallurgical properties, types of brazed seams and different arc-processes under cyclic load were investigated. This should extinguish the base for an extended application of arc-brazed joints at cyclic loaded, high strength, property adjusted structures. IntroductionNowadays the interest in joining metal sheets by low-heat methods like adhesives, clinching and brazing remarkably increases. Especially the application of automated brazing processes and the development of new brazing fillers and process methods have resulted in an ongoing increase of the importance of brazing as a joining option [1][2][3]. Due to its flexibility hard-brazing has become an important alternative to common metal-arc-welding (MAW) processes in modern manufacturing. It can be regarded as a promising and cost-effective joining process for the fields of automotive and aerospace, energy, and logistics. The advantages of hard-brazing include corrosion resistance, low distortion, and over all local material properties are hardly influenced, due to the low heat input. As a result the brazing process is appropriate for joining heat-sensitive and locally hardened structures [4,5]. These materials pass through a complex manufacturing process to get their locally defined properties. They can be easily destroyed in case of heat exposure (e.g. martensite formation, local softening and others). As a consequence of the low heat process these complex characteristics are just limited affected. As a hard brazing process recently arc brazing is the most demanded for joining high strength and dynamical loaded structures [6][7][8][9].Deficits which have prevented the widespread use of brazed high-strength structures and nodes are associated especially with the reliability of the brazed joint. There is a lack of understanding the interaction of the brazing parameters, the geometry of the brazed seam, and the brazing filler regarding of reliability and reproducibility. Indeed these factors are not the only challenges for the use of brazed joints but there is also an immense divergence of the strength between locally hardened high strength steels, used in this project, and the applied copper-based filler. Mainly hardbrazed joints are qualified by static strength -tensile test -but normally not by fatigue testings. Fatigue strength is detected as add on at the end of investigations [4]. In particular, the behaviour of brazed structures of materials with locally altered properties under alternating stress cannot be appraised with conventional methods. Consequently, so far it has not been possible to predict the lifetime of brazed structures and nodes under alternating stress. To increase the...

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Low Heat Joining – Manufacturing and Fatigue Strength of Brazed, Locally Hardened Structures

Wesling

Schram

Kessler

2010

AMR

Self Cite

View full text Add to dashboard Cite

show abstract

“…The fatigue behavior was also intensively investigated in the thin sheet sector (see [2,3]). Sheet thicknesses from 0.8 to 2.4 mm were designed as various joint geometries and showed advantageous dynamic behavior compared to conventional welded joints.…”

Section: Introductionmentioning

confidence: 99%

Investigations on arc brazing for galvanized heavy steel plates in steel and shipbuilding

2021

View full text Add to dashboard Cite

Arc brazing with low-melting copper-based filler materials, which has long been established and standardized in the thin sheet sector, offers numerous advantages in the processing of predominantly electrolytically galvanized steel structures. In steel and shipbuilding, on the other hand, equipment parts made of thick steel sheets are hot-dip galvanized at low cost and with good corrosion-inhibiting properties. Quality welding of such constructions is not possible without special precautions such as removing the zinc layer and subsequent recoating. With regard to greater plate thicknesses, arc brazing was analyzed in these investigations as an alternative joining method with regard to its suitability for practical use. Within the scope of the investigations, CuSi3Mn, CuMn12Ni2, and four different aluminum bronzes were examined on different sheet surface conditions with regard to the geometrical and production parameters. This was carried out by build-up and connection brazing, executed as butt and cross joints. Quasi-static tensile tests and fatigue tests were used to assess the strength behavior. In addition, metallographic analyses are carried out as well as hardness tests. The suitability for multi-layer brazing and the tendency to distortion were also investigated, as well as the behavior of arc brazed joints under corrosive conditions.

show abstract

The effect of arc brazing process parameters on the microstructure and mechanical properties of high-strength steel HCT780XD using the copper-based filler metal CuAl8

Reisgen

Angerhausen

Pipinikas

et al. 2017

Journal of Materials Processing Technology

View full text Add to dashboard Cite

Manufacturing and Fatigue Strength of Brazed, Locally Hardened Structures

Cited by 4 publications

References 2 publications

Low Heat Joining – Manufacturing and Fatigue Strength of Brazed, Locally Hardened Structures

Low Heat Joining – Manufacturing and Fatigue Strength of Brazed, Locally Hardened Structures

Investigations on arc brazing for galvanized heavy steel plates in steel and shipbuilding

The effect of arc brazing process parameters on the microstructure and mechanical properties of high-strength steel HCT780XD using the copper-based filler metal CuAl8

Contact Info

Product

Resources

About