Strain limit of extra galvannealed Interstitial-Free and bake hardened steel sheets under different stress conditions

2008 ◽  
Vol 15 (5) ◽  
pp. 56-60 ◽  
Author(s):  
R Narayanasamy ◽  
N L Parthasarathi ◽  
R Ravindran ◽  
C Sathiya Narayanan
Keyword(s):  
Hardened Steel ◽  
Stress Conditions ◽  
Interstitial Free ◽  
Steel Sheets ◽  
Strain Limit ◽  
Bake Hardened Steel

Experimental investigation on resistance spot welding of dissimilar weld joints

2020 ◽  
pp. 095440892096835
Author(s):  
Rohit Verma ◽  
Kanwer Singh Arora ◽  
Lochan Sharma ◽  
Rahul Chhibber
Keyword(s):  
Welding Process ◽  
High Strength ◽  
Dynamic Resistance ◽  
Interstitial Free ◽  
Resistance Spot ◽  
Dissimilar Weld ◽  
Steel Sheets ◽  
Weld Joints ◽  
Resistance Spot Weld ◽  
Weld Current

In the present study, galvanized High Strength Interstitial Free (HIF) steel sheets, and Dual Phase (DP780) steel sheets were used for the investigations. Resistance spot weld joints were fabricated between dissimilar steel sheets. The variation in dynamic resistance (DR) with the change in welding process parameters such as weld current, weld time and electrode force were used for establishing the range of adequate weld nugget formation parameters. Effect of these parameters over tensile strength, nugget diameter and the observed failure mode was studied using one factor at a time (OFAT) approach. Microstructure and hardness of parent metal, fusion & HAZ region has also been studied.

scholarly journals The Performance of CR180IF and DP600 Laser Welded Steel Sheets under Different Strain Rates

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1553
Author(s):  
Mária Mihaliková ◽  
Kristína Zgodavová ◽  
Peter Bober ◽  
Anna Špegárová
Keyword(s):  
Sheet Steel ◽  
Testing Machine ◽  
Dynamic Test ◽  
Tensile Tests ◽  
Joint Surface ◽  
Strain Rates ◽  
Interstitial Free ◽  
Welded Steel ◽  
Steel Sheets ◽  
Static Tensile

The presented research background is a car body manufacturer’s request to test the car body’s components welded from dissimilar steel sheets. In view of the vehicle crew’s protection, it is necessary to study the static and dynamic behavior of welded steels. Therefore, the influence of laser welding on the mechanical and dynamical properties, microstructure, microhardness, and welded joint surface roughness of interstitial free CR180IF and dual-phase DP600 steels were investigated. Static tensile tests were carried out by using testing machine Zwick 1387, and dynamic test used rotary hammer machine RSO. Sheet steel was tested at different strain rates ranging from 10−3 to 103 s−1. The laser welds’ microstructure and microhardness were evaluated in the base metal, heat-affected zone, and fusion zone. The comprehensive analysis also included chemical analysis, fracture surface analysis, and roughness measurement. The research results showed that the strain rate had an influence on the mechanical properties of base materials and welded joints. The dynamic loading increases the yield stress more than the ultimate tensile strength for the monitored steels, while the most significant increase was recorded for the welded material.

Effect of TiN-Particles on Fracture of Press-Hardened Steel Sheets and Components

JOM ◽  
2019 ◽  
Vol 71 (4) ◽  
pp. 1329-1337 ◽  
Author(s):  
J. C. Pang ◽  
H. L. Yi ◽  
Q. Lu ◽  
C. M. Enloe ◽  
J. F. Wang
Keyword(s):  
Hardened Steel ◽  
Steel Sheets

Effect of r-value and texture on plastic deformation and necking behavior in interstitial-free steel sheets

2017 ◽  
Vol 23 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Gyu-Jin Oh ◽  
Kye-Man Lee ◽  
Moo-Young Huh ◽  
Jin Eon Park ◽  
Soo Ho Park ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Interstitial Free ◽  
Steel Sheets ◽  
Interstitial Free Steel ◽  
R Value
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