Microalloyed Steel Under Tension and Bending Condition (original) (raw)
Related papers
Analysis of the Influence of the Loading Rate on the Mechanical Properties of Microalloyed Steel
The aim of this paper is to analyse the influence of the loading rate in the range from 1 to 1000 mm/min, which corresponds to the tensile machine working range, on the strength properties and the formability characteristics obtained on standard and notched test bars made of steel strips. The combination of the loading rate and the test bar type made it possible to obtain the relationship of monitored variables in the strain rate interval from 10 -4 to 10 s -1 . In this interval, the strength properties of the tested strips thickness of 1, 1.5 and 1.8 mm increase exponentially, but formability does not change up to the strain rate of 1 s -1 .
Drawing Quality Steel Sheet under Tension and Bending Condition
The paper analyzes the influence of the loading rate in the interval from 1 to 1000 mm/min on the mechanical properties of drawing quality steel sheet with the gauge of 1 mm, used for the manufacturing of automotive parts, under tension and bending conditions. It describes the aspects of material characteristics under tension and bending conditions, while bending tests were made on notched specimens (a modified impact bending test). The paper presents knowledge that using a modified notch toughness test. It is possible to achieve the pressability (formability) characteristics corresponding to dynamic strain rates even under the static loading.
Impact of Strain Rate on Microalloyed Steel Sheet Breaking
Acta Polytechnica, 2014
The strain rate is a significant external factor, and its influence on material behavior in the forming process is a function of its internal structure. This paper presents an analysis of the impact of the loading rate from 1.6 x 10-4 m s-1 to 24 m s-1 on changes in the fracture properties of steel sheet used for bodywork components in cars. Experiments were performed on samples taken from HC420LA grade strips produced by cold rolling and hot dip galvanization. Material strength properties were compared on the basis of measured values, and changes to the character of the fracture surface were observed.
The Effect of Strain Rate on the Mechanical Properties of Automotive Steel Sheets
Acta Polytechnica, 2013
The automotive industry is currently seeking detailed information about various types of materials and their behavior under dynamic loading. Dynamic tensile testing of sheet steels is growing in importance. The experimental dynamic tensile technique depends on the strain rate. Each type oftest serves for a specific range of strain rates, and provides specific types of information. This workdeals with the influence of the strain rate on the mechanical properties of automotive steel sheets.Three different types of steel: IF steel, DP steel, and micro-alloyed steel (S 460) were used to compare static and dynamic properties.
The Analysis of Automotive Steels at different Strain Rate
Materials Today: Proceedings, 2016
Currently, the automotive industry uses sheets of different qualities. The most common ones include IF (Interstitial Free) steel and micro-alloyed steel. Use of quality sheet depends on the point of application in car production. Testing and product testing is a standard part of the process of innovation and production itself. Testing of automotive steels under dynamic conditions is increasingly important. Changing the hardness HV 1 was performed on the fractured bars under static and dynamic loading conditions. Tests were made on steel IF and S 460.
The Deformation Properties of High Strength Steel Sheets for Auto-body Components
Procedia Engineering, 2014
The automotive industry requires defining restrictive criteria for prediction of technology characteristics as well as safety characteristics at car's collision with another object when auto-body components are produced from sheet metal blanks. The article presents the methodology for specification the material properties effects to overloading of human organism. Overloading depends on the geometry of the components, on the strain-hardening intensity and limit value of auto-body component's shortening that affect the component deformation path. Proposed criteria are analyzed for the following sheet metal blanks: microalloyed steel H220PD, TRIP steel RAK 40/70, duplex stainless steel, austenitic steel DIN 1.4301 and deep-drawing steel DX 54. The forming limit curves were measured by tensile test performed on the notched specimens with different notch radius.
Archives of Metallurgy and Materials, 2015
The paper presents results of dynamic tensile investigations of high-manganese Fe-20 wt.% Mn-3 wt.% Al-3 wt.% Si-0.2 wt.% steel. The research was carried out on a flywheel machine, which enables to perform dynamic tensile tests and impact bending with a linear velocity of the enforcing element in the range of 5÷40 m/s. It was found that the studied steel was characterized by very good mechanical properties. Strength of the tested materials was determined in the static tensile test and dynamic deformation test, while its hardness was measured with the Vickers hardness test method. The surface of fractures that were created in the areas where the sample was torn were analyzed. These fractures indicate the presence of transcrystalline ductile fractures. Fractographic tests were performed with the use of a scanning electron microscope. The structure was analyzed by light optical microscopy. Substructure studies revealed occurrence of mechanical twinning induced by high strain rates. A detailed analysis of the structure was performed with the use of a transmission scanning electron microscope STEM.
Dynamic characteristics of automotive steel sheets
Metalurgija, 2016
M. Mihaliková, A. Lišková, Faculty of Metallurgy, Technical University of Košice, Slovakia The aim of this experimental research was to perform an analysis of deformation characteristics on two different types of steel: IF steel, and micro-alloyed steel were used automotive industry. For that purpose changes of properties of these materials were carried out by static 10-3 · s-1 and dynamic 103 · s-1 strain rate assess its plastic properties. Vickers micro hardness test was carried out by the static and dynamic loading condition and describes different hardness distribution. The higher strain hardening of materials was obtained too that was confirmed by distribution of dislocations.
Characterising Effects Of Applied Loads On The Mechanical Properties Of Formed Steel Sheets
2013
The purpose of this research study is to investigate the manner in which various loads affect the mechanical properties of the formed mild steel plates. The investigation focuses on examining the cross-sectional area of the metal plate at the centre of the formed mild steel plate. Six mild steel plates were deformed with different loads. The loads applied on the plates had a magnitude of 5 kg, 10 kg, 15 kg, 20 kg, 25 kg and 30 kg. The radius of the punching die was 120 mm and the loads were applied at room temperature. The investigations established that the applied load causes the Vickers microhardness at the cross-sectional area of the plate to increase due to strain hardening. Hence, the percentage increase of the hardness due to the load was found to be directly proportional to the increase in the load. Furthermore, the tensile test results for the parent material showed that the average Ultimate Tensile Strength (UTS) for the three samples was 308 MPa while the average Yield St...