Characterization of Cold Rolled TRIP Steels for Structural Crash-Relevant Applications in the Automotive Industry

2002 ◽  
Author(s):  
L. Tosal-Martínez ◽  
L. Cretteur ◽  
O. Moriau ◽  
A. Ihsan Koruk
Keyword(s):  
Automotive Industry ◽  
Trip Steels ◽  
Cold Rolled

scholarly journals Microstructural and Mechanical Characterization of Al-0.80Mg-0.85Si-0.3Zr Alloy

2017 ◽  
Vol 17 (4) ◽  
pp. 73-78 ◽  
Author(s):  
F. Kahrıman ◽  
M. Zeren
Keyword(s):  
Mechanical Properties ◽  
Automotive Industry ◽  
Room Temperature ◽  
Tensile Tests ◽  
Direct Chill ◽  
Peak Hardness ◽  
Casting Method ◽  
Industry Standard ◽  
Three Stages

Abstract In this study, Al-0.80Mg-0.85Si alloy was modified with the addition of 0.3 wt.-% zirconium and the variation of microstructural features and mechanical properties were investigated. In order to produce the billets, vertical direct chill casting method was used and billets were homogenized at 580 °C for 6 h. Homogenized billets were subjected to aging practice following three stages: (i) solution annealing at 550 °C for 3 h, (ii) quenching in water, (iii) aging at 180 °C between 0 and 20 h. The hardness measurements were performed for the alloys following the aging process. It was observed that peak hardness value of Al-0.80Mg-0.85Si alloy increased with the addition of zirconium. This finding was very useful to obtain aging parameters for the extruded hollow profiles which are commonly used in automotive industry. Standard tensile tests were applied to aged profiles at room temperature and the results showed that modified alloy had higher mechanical properties compared to the non-modified alloy.

Work-hardening and ductility enhancement mechanism of cold rolled multiphase TRIP steels

2010 ◽  
Vol 16 (4) ◽  
pp. 533-541 ◽  
Author(s):  
Jin Hwan Chung ◽  
Jong Bae Jeon ◽  
Young Won Chang
Keyword(s):  
Work Hardening ◽  
Trip Steels ◽  
Enhancement Mechanism ◽  
Cold Rolled

Microstructural and Mechanical Characterization of Gray Cast Iron and AlSi Alloy after Laser Beam Hardening

2010 ◽  
Vol 638-642 ◽  
pp. 769-774 ◽  
Author(s):  
Waldemar Alfredo Monteiro ◽  
E.M.R. Silva ◽  
L.V. Silva ◽  
W. de Rossi ◽  
S.J. Buso
Keyword(s):  
Wear Resistance ◽  
Laser Beam ◽  
Automotive Industry ◽  
Automobile Industry ◽  
Gray Iron ◽  
Beam Hardening ◽  
Localized Source ◽  
Alsi Alloy ◽  
Hardening Treatment

A localized source of heat, such as that of laser beam, can provide a convenient means of producing a surface layer of altered microstructure. By using surface hardening treatment, wear resistance can be increased. Experiments were performed using a Nd:YAG pulsed laser under different processing conditions. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray mapping (SEM) were employed to observe the effect of laser melting treatment on the microstructural properties of the samples. Depending on the selected laser treatment working conditions, different microstructures characteristics of surface melting can be achieved in the treated zone. Higher microhardness values were found at the treated area showing a superficial hardening of the sample and, consequently, an improvement of the wear resistance of these automotive alloys. The aim of this work is to find the optimal process parameters and to evaluate the characteristics of the laser superficial hardening (LSH) in a pearlitic gray iron and Al-Si alloy used in an automobile industry (bearing and piston materials in automotive industry).

scholarly journals Characterization of reverse martensitic transformation in cold-rolled austenitic 316 stainless steel

2018 ◽  
Vol 23 (2) ◽  
Author(s):  
Javier Fava ◽  
Cristina Spinosa ◽  
Marta Ruch ◽  
Fernando Carabedo ◽  
Mónica Landau ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Martensitic Transformation ◽  
Reverse Martensitic Transformation ◽  
316 Stainless Steel ◽  
Cold Rolled

Magnetic and microstructural characterization of cold rolled UNS S31803duplex stainless steel

2017 ◽  
Vol 29 (2) ◽  
pp. 22-27 ◽  
Author(s):  
C.S.P. Mendonça ◽  
V.D. de Oliveira ◽  
V.A.S. Ribeiro ◽  
A.F. Oliveira ◽  
M.R. da Silva ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Microstructural Characterization ◽  
Cold Rolled

Vacuum Foaming of Aluminum Scrap

2012 ◽  
Vol 1481 ◽  
pp. 83-88
Author(s):  
J. A. Garabito ◽  
H. Granados ◽  
V. H. López ◽  
A. R. Kennedy ◽  
J. E. Bedolla
Keyword(s):  
Automotive Industry ◽  
Vacuum Chamber ◽  
Low Cost ◽  
Porous Structures ◽  
Aluminum Foams ◽  
Casting And Solidification ◽  
Different Temperatures ◽  
Different Levels ◽  
Al Foams

ABSTRACTIn this study, scrap from the automotive industry was used to produce aluminium foams under vacuum. Chips of an aluminium alloy LM26 were melted and 1wt. % of Mg was added for creating a viscous casting with uniform distribution of oxides. An ingot was obtained of this alloy after casting and solidification. Trials for foaming this alloy were performed by re-melting pieces under vacuum at different temperatures. A window in the vacuum chamber allowed observation of the foaming and collapse of the porous structures was observed during cooling. Characterization of the aluminum foams revealed different levels of expansion, porous structures and degrees of drainage. The best foams were obtained at 680 °C with a density of 0.78 g/cm3. This technique appears to be a feasible low cost route for producing Al foams based on scrap material.

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