scholarly journals Dissimilar fiber laser welding between dual phase and high strength low alloy steels

2021 ◽  
Author(s):  
Dennis Charles Parkes
Keyword(s):  
Fiber Laser ◽  
High Strength ◽  
Fatigue Behaviour ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Fiber Laser Welding ◽  
Dissimilar Joints ◽  
Dissimilar Welds ◽  
Alloy Steels ◽  
Zinc Coatings

With increasing use of dual phase steels in the automotive industry, it is important to have an understanding of how they behave when they are welded to conventional high strength low alloy steels (HSLA). Fiber laser welded dissimilar joints between DP980 and HSLA steels were evaluated in tension at low temperature (-40°C), room temperature (25°C), elevated temperature (180°C), and in fatigue under different welding conditions. Triple dissimilar welds were tested in various combinations and with different types of protective zinc coatings to determine the effect that coatings play on the tensile and fatigue behaviour. Lastly, an analysis was done on how the change in DP980 chemistry could affect the final mechanical properties of their welded joints.

scholarly journals Dissimilar fiber laser welding between dual phase and high strength low alloy steels

2021 ◽  
Author(s):  
Dennis Charles Parkes
Keyword(s):  
Fiber Laser ◽  
High Strength ◽  
Fatigue Behaviour ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Fiber Laser Welding ◽  
Dissimilar Joints ◽  
Dissimilar Welds ◽  
Alloy Steels ◽  
Zinc Coatings

With increasing use of dual phase steels in the automotive industry, it is important to have an understanding of how they behave when they are welded to conventional high strength low alloy steels (HSLA). Fiber laser welded dissimilar joints between DP980 and HSLA steels were evaluated in tension at low temperature (-40°C), room temperature (25°C), elevated temperature (180°C), and in fatigue under different welding conditions. Triple dissimilar welds were tested in various combinations and with different types of protective zinc coatings to determine the effect that coatings play on the tensile and fatigue behaviour. Lastly, an analysis was done on how the change in DP980 chemistry could affect the final mechanical properties of their welded joints.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

scholarly journals Experimental and numerical investigation of the overload effect on fatigue behaviour of spot-welded steel sheets

2018 ◽  
Vol 106 (3) ◽  
pp. 309 ◽  
Author(s):  
Fabienne Pennec ◽  
Bianzeubé Tikri ◽  
Sébastien Bergamo ◽  
Michel Duchet ◽  
Bastien Weber ◽  
...  
Keyword(s):  
Failure Modes ◽  
Hsla Steel ◽  
High Strength ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Favourable Effect ◽  
Low Alloy Steels ◽  
Element Analysis ◽  
Alloy Steels ◽  
Spot Welded

Spot-weld joints are commonly used to fasten together metal sheets in automotive industry. The car frame used in Renault vehicles is a representative example of the usefulness of this method. Most of the spot-welds experience fatigue damaging occurrence due to rough roads or driving conditions which apply periodical overloads to the vehicle. Understanding their fatigue behaviour is crucial from the viewpoint of failure prevention in design. In this study, a series of experiments was conducted to study the fatigue failure of spot-welded tensile-shear specimens made of a deep-drawing steel (XES) and High strength low alloy steels (HE360D and XE360D). Two different types of fatigue tests were performed, the first one with a constant-amplitude sinusoidal loading (loading ratio equal to 0.1) and the second one with one incidental overload cycle introduced per 100 cycles. The experimental results show a favourable effect of overloads for HSLA steel specimens, whereas the effect is the opposite for XES steel specimens. A finite element analysis was carried out using the open-source Salome-Meca platform to determine the stress states within the specimens around the weld spot and explains both failure modes observed on the specimens at high and low loads.

INCONEL FILLER METAL 625

Alloy Digest ◽  
1985 ◽  
Vol 34 (12) ◽  
Keyword(s):  
Filler Metal ◽  
High Strength ◽  
Heat Treating ◽  
Carbon Steels ◽  
Low Alloy Steels ◽  
Alloy 800H ◽  
Dissimilar Joints ◽  
Gas Tungsten Arc ◽  
Inconel Alloys ◽  
Alloy Steels

Abstract INCONEL Filler Metal 625 is used for gas-metal-arc and gas-tungsten-arc welding of INCONEL alloys 625 and 601 and INCOLOY alloy 800H. It is also used for surfacing of steel, for welding nickel steels, and for welding various corrosion-resistant alloys such as INCO Alloys G and 904L. It has high strength and exceptional resistance to corrosion. Filler metal 625 is useful for many dissimilar joints involving INCONEL and INCOLOY alloys, carbon steels, low-alloy steels and stainless steels. This datasheet provides information on composition and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-327. Producer or source: Inco Alloys International Inc..

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