scholarly journals Mechanical Properties Characterization of Welded Automotive Steels

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 1 ◽  
Author(s):  
Ehsan Javaheri ◽  
Janot Lubritz ◽  
Benjamin Graf ◽  
Michael Rethmeier
Keyword(s):  
Mechanical Properties ◽  
Laser Beam ◽  
Automobile Industry ◽  
Laser Beam Welding ◽  
Steel Structures ◽  
Material Model ◽  
Tensile Specimen ◽  
Material Behavior ◽  
Resistance Spot ◽  
Indentation Tests

Among the various welding technologies, resistance spot welding (RSW) and laser beam welding (LBW) play a significant role as joining methods for the automobile industry. The application of RSW and LBW for the automotive body alters the microstructure in the welded areas. It is necessary to identify the mechanical properties of the welded material to be able to make a reliable statement about the material behavior and the strength of welded components. This study develops a method by which to determine the mechanical properties for the weldment of RSW and LBW for two dual phase (DP) steels, DP600 and DP1000, which are commonly used for the automotive bodies. The mechanical properties of the resistance spot weldment were obtained by performing tensile tests on the notched tensile specimen to cause an elongation of the notched and welded area in order to investigate its properties. In order to determine the mechanical properties of the laser beam weldment, indentation tests were performed on the welded material to calculate its force-penetration depth-curve. Inverse numerical simulation was used to simulate the indentation tests to determine and verify the parameters of a nonlinear isotropic material model for the weldment of LBW. Furthermore, using this method, the parameters for the material model of RSW were verified. The material parameters and microstructure of the weldment of RSW and LBW are compared and discussed. The results show that the novel method introduced in this work is a valid approach to determine the mechanical properties of welded high-strength steel structures. In addition, it can be seen that LBW and RSW lead to a reduction in ductility and an increase in the amount of yield and tensile strength of both DP600 and DP1000.

Weldability and mechanical properties of IC10 single crystal and GH3039 superalloy dissimilar laser beam welding joint

2020 ◽  
Vol 791 ◽  
pp. 139797
Author(s):  
Wenhua Dai ◽  
Sun Wenjun ◽  
Jijun Xin ◽  
Shanlin Wang ◽  
Chao Fang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Laser Beam ◽  
Single Crystal ◽  
Laser Beam Welding ◽  
Welding Joint

Joining of Aluminium Structures with Aluminium Foams

1998 ◽  
Vol 521 ◽  
Author(s):  
J. Burzer ◽  
T. Bernard ◽  
H. W. Bergmann
Keyword(s):  
Mechanical Properties ◽  
Laser Beam ◽  
Tensile Test ◽  
Laser Beam Welding ◽  
Welding Parameters ◽  
Transportation Industry ◽  
Absorption Properties ◽  
Testing Method ◽  
New Construction ◽  
Joining Process

ABSTRACTThe aim of this work is the evaluation of new construction elements for applications in transportation industry which are based on new designs incorporating commonly applied aluminium structures and aluminium foams. The work includes the characterisation of the joining process, the joining mechanism and the mechanical properties of the joining zone. A testing method for the joints is developed which is based on a common tensile test in order to evaluate the influence of the main laser welding parameters on the toughness of the joints and to afford a comparison between laser beam welding and gluing process. The analysis of the joining mechanism is investigated with the help of metallographic studies. In addition, the energy absorption properties of aluminium hollows filled and joined with foam structures are characterised.

Effect of Laser Beam Welding on Microstructure and Mechanical Properties of Commercially Pure Titanium

2016 ◽  
Vol 70 (7) ◽  
pp. 1817-1825 ◽  
Author(s):  
Santosh Kumar Sahoo ◽  
Bibhudutta Bishoyi ◽  
Upendra Kumar Mohanty ◽  
Sushant Kumar Sahoo ◽  
Jambeswar Sahu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Laser Beam ◽  
Laser Beam Welding ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Microstructure And Mechanical Properties

Fiber Laser Beam Welding of Ti-6242 - Effect of Processing Parameters on Microstructural and Mechanical Properties

2016 ◽  
Vol 879 ◽  
pp. 903-908 ◽  
Author(s):  
Nikolai Kashaev ◽  
Dmitry Pugachev ◽  
Stefan Riekehr ◽  
Volker Ventzke
Keyword(s):  
Mechanical Properties ◽  
Laser Beam ◽  
Fiber Laser ◽  
Laser Beam Welding ◽  
Base Material ◽  
Butt Joint ◽  
Beam Power ◽  
Focus Position ◽  
Laser Beam Power ◽  
Advance Speed

The present work investigates the effects of laser beam power, focus position and advance speed on the geometry, microstructure and mechanical properties of fiber laser beam welded Ti-6Al-2Sn-4Zr-2Mo (denoted as Ti-6242) butt joints used for high temperature applications. Detailed microstructural and mechanical studies were performed on welds produced using optimized parameters (a laser beam power of 5 kW, a focus position of 0.0 mm and an advance speed of 6.2 m/min). The Ti-6242 base material is characterized by a globular (α+β) microstructure. The heat input during laser beam welding led to the formation of a martensitic α’-phase fusion zone. The heat affected zone consisted of globular grains and acicular crystallites. These local transformations were connected with a change in the micro-texture, average grain size and β-phase content. Furthermore, the microhardness increased from 330 HV 0.3 to 450 HV 0.3 due to the martensitic transformation. The mechanical behavior of the laser beam welded Ti-6242 butt joint loaded in tension was determined by the properties of the Ti-6242 base material. The local increase in hardness provided a shielding effect that protected the Ti-6242 butt joint against mechanical damage.

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