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View article: Deformation rate dependence on fracture characteristics of third generation Advanced High Strength Steel
Deformation rate dependence on fracture characteristics of third generation Advanced High Strength Steel Open
The gradually more stringent environmental and safety regulations in the transport sector have made third generation Advanced High Strength Steel (3rd-gen AHSS) grades excellent alternatives to lower strength steel grades and have continuo…
View article: Assessment of Rate-Dependency and Adiabatic Heating on the Essential Work of Fracture of Press-Hardening Steels
Assessment of Rate-Dependency and Adiabatic Heating on the Essential Work of Fracture of Press-Hardening Steels Open
The automotive industry is currently in a paradigm shift transferring the fleet over from internal combustion vehicles to battery electric vehicles (BEV). This introduces new challenges when designing the body-in-white (BIW) due to the sen…
View article: Modelling of ductile fracture considering the effect of stress triaxiality and the energy partition theory in thin high-strength steel sheets
Modelling of ductile fracture considering the effect of stress triaxiality and the energy partition theory in thin high-strength steel sheets Open
It is well recognized in the literature that the fracture process of thin metal sheets involves three energy dissipation mechanisms i.e., plasticity, necking and surface separation. However, the complex stress state in thin structures hind…
View article: The Relationship Between Fracture Toughness and Blanking Performance of 850MPa Hot-Rolled Steels
The Relationship Between Fracture Toughness and Blanking Performance of 850MPa Hot-Rolled Steels Open
Hot-rolled steel grades can serve as cost-effective and high-performance solutions for automotive and heavy transportation chassis and seat parts. These applications generate significant demand for cut-edge quality, stretch flangeability, …
View article: Enhanced ductility and fracture classification maps for advanced high-strength steels considering local ductility and fracture toughness
Enhanced ductility and fracture classification maps for advanced high-strength steels considering local ductility and fracture toughness Open
Alternative classification diagrams considering global and local ductility have been introduced recently in order to better describe the overall formability of advanced high-strength steels (AHSSs). These diagrams combine different paramet…
View article: Effect of recycling on the mechanical properties and formability of sheet metal
Effect of recycling on the mechanical properties and formability of sheet metal Open
This technical note analyses the effect of recycling on the mechanical and forming behaviour of two aluminium alloys (5xxx and 6xxx series) and a low-carbon high-formability steel grade, three of the most widely used sheet metal products i…
View article: A particle finite element method approach to model shear cutting of high-strength steel sheets
A particle finite element method approach to model shear cutting of high-strength steel sheets Open
Shear cutting introduces residual strains, notches and cracks, which negatively affects edge-formability. This is especially relevant for forming of high-strength sheets, where edge-cracking is a serious industrial problem. Numerical model…
View article: Understanding the Fatigue Notch Sensitivity of High-Strength Steels through Fracture Toughness
Understanding the Fatigue Notch Sensitivity of High-Strength Steels through Fracture Toughness Open
This study presents an innovative approach for selecting high-strength materials for fatigue dimensioning parts, considering both fracture toughness and fatigue performance. Warm and hot forming processes enable the construction of high-st…
View article: Crashworthiness evaluation of press hardened steels with different lath-like microstructures.
Crashworthiness evaluation of press hardened steels with different lath-like microstructures. Open
The deployment of Press Hardened Steels (PHSs) in the Body-In-White structures that took place during the two last decades is at the origin of a breakthrough weight saving on vehicles while guaranteeing the safety requirements of the autom…
View article: Effect of pre-strain on edge formability of high strength steels for chassis applications
Effect of pre-strain on edge formability of high strength steels for chassis applications Open
There is a high level of uncertainty in the prediction of edge cracking during the design and manufacturing of high strength sheet metal products. Edge ductility is a complex parameter to measure since it is not an intrinsic property of th…
View article: Fracture toughness to assess the effect of trimming on the fatigue behaviour of high-strength steels for chassis parts
Fracture toughness to assess the effect of trimming on the fatigue behaviour of high-strength steels for chassis parts Open
High-strength steels are widely used in vehicle body-in-white, offering a good balance between crashworthiness and lightweight design. The increased requirements of heavier electric vehicles, in terms of fatigue resistance and crashworthin…
View article: Optimization of Thick 22MnB5 Sheet Steel Part Performance through Laser Tempering
Optimization of Thick 22MnB5 Sheet Steel Part Performance through Laser Tempering Open
Press Hardening offers the possibility to obtain a wide range of mechanical properties through microstructural tailoring. This strategy has been successfully applied in thin sheet components, for instance, through differential cooling stra…
View article: Toughness properties influence on the automotive stamped components
Toughness properties influence on the automotive stamped components Open
The CO2 emissions of passengers cars and commercial vehicles are becoming more and more important year by year because they have a direct effect on climate change. For this reason, the main OEMs are increasing the usage of Advance High Str…
View article: Sheared edge formability characterization of cold-rolled advanced high strength steels for automotive applications
Sheared edge formability characterization of cold-rolled advanced high strength steels for automotive applications Open
Edge cracking has become a limiting factor in the use of some advanced high strength steels (AHSS) for high-performance automotive applications. This fact has motivated the development of a multitude of experimental tests for edge formabil…
View article: Warm Forming of Hot Rolled High Strength Steels - with Enhanced Fatigue Resistance as a LightweightSolution for HeavyDuty Vehicles
Warm Forming of Hot Rolled High Strength Steels - with Enhanced Fatigue Resistance as a LightweightSolution for HeavyDuty Vehicles Open
Most solutions for a lightweight design are based on the implementation of AHSS, Al alloys or CFRP. However, not all these strategies are susceptible to be applied to truck chassis parts. These components require high fatigue resistance an…
View article: Assessing the effect of the experimental parameters in the evaluation of the essential work of fracture in high-strength thin sheets
Assessing the effect of the experimental parameters in the evaluation of the essential work of fracture in high-strength thin sheets Open
The essential work of fracture methodology (EWF) has been successfully adopted to evaluate the fracture toughness of various metals and polymers. However, some aspects of the methodology are still far less understood, such as the influence…
View article: Prediction of sheared edge characteristics of advanced high strength steel
Prediction of sheared edge characteristics of advanced high strength steel Open
In the present work, numerical models are developed for the shearing and cutting process of advanced high strength steel-blanks which can predict the edge morphology in the shear effected zone. A damage model, based on the modified Mohr-Co…
View article: Stating Failure Modelling Limitations of High Strength Sheets: Implications to Sheet Metal Forming
Stating Failure Modelling Limitations of High Strength Sheets: Implications to Sheet Metal Forming Open
This article discusses the fracture modelling accuracy of strain-driven ductile fracture models when introducing damage of high strength sheet steel. Numerical modelling of well-known fracture mechanical tests was conducted using a failure…
View article: Effect of alloying and microstructure on formability of advanced high-strength steels processed via quenching and partitioning
Effect of alloying and microstructure on formability of advanced high-strength steels processed via quenching and partitioning Open
The article focuses on the effect of alloying and microstructure on formability of advanced high strength steels (AHSSs) processed via quenching and partitioning (Q&P). Three different Q&P steels with different combination of alloying elem…
View article: Effect of heat treatment conditions on the fatigue resistance of press hardened 22MnB5 steel evaluated through rapid testing technique
Effect of heat treatment conditions on the fatigue resistance of press hardened 22MnB5 steel evaluated through rapid testing technique Open
Fatigue strength is considered as a crucial parameter for automotive applications subjected to cyclic loads during their long service life, as chassis parts. The high yield stress of press hardened steels poses them as good candidates for …
View article: A new cracking resistance index based on fracture mechanics for high strength sheet metal ranking
A new cracking resistance index based on fracture mechanics for high strength sheet metal ranking Open
Driven by current safety and weight reduction policies in the automotive sector, the development of new high strength sheet metal products has experienced unprecedented growth in the last years. With the emergence of these high strength ma…
View article: On the measurement of fracture toughness to understand the cracking resistance of advanced high strength steel sheets
On the measurement of fracture toughness to understand the cracking resistance of advanced high strength steel sheets Open
Automotive designers are constantly facing new challenges to meet the more and more stringent safety and CO2 emission legislations. Concerning the latter, vehicle lightweighting has become one of the main goals of the automotive industry, …
View article: Fracture Resistance of Advanced High-Strength Steel Sheets for Automotive Applications
Fracture Resistance of Advanced High-Strength Steel Sheets for Automotive Applications Open
The fracture resistance of different advanced high-strength steel (AHSS) sheets for automotive applications is investigated through conventional tensile tests, fracture toughness measurements, and hole expansion tests. Different fracture-r…
View article: Microstructural effects on fracture toughness of ultra-high strength dual phase sheet steels
Microstructural effects on fracture toughness of ultra-high strength dual phase sheet steels Open
The influence of the microstructure on the fracture toughness of two industrially processed 1000 MPa dual-phase (DP) steel grades is investigated. Crack initiation and propagation resistance are evaluated by means of the essential work of …
View article: New tool to evaluate the fracture resistance of thin high strength metal sheets
New tool to evaluate the fracture resistance of thin high strength metal sheets Open
Fracture toughness has become a key property to predict the fracture performance of high strength metal sheets (edge cracking resistance, crash failure behaviour, local formability, etc.). However, the measurement of the fracture toughness…