Advanced High Strength Steel in Auto Industry: an Overview (original) (raw)
Related papers
Assessment of Advanced High Strength Steels used in Auto Industry – A Review
Advanced High Strength Steels (AHSS) are steels considered to be the major materials for future applications in automotive production and other sectors of the economy. In this article, assessment of advanced high strength steels (AHSS) used in automotive industry was discussed, including the steel compositions, microstructure and mechanical properties developed during thermal processing, advantages and disadvantages, their potential applications and performance in service. Various strengthening mechanisms are employed to achieve a range of strength, ductility, toughness, and fatigue properties of these materials. As opposed to the cold formable single phase deep-drawable grades, the mechanical properties of AHSS steels are controlled by many factors, including the following; phase composition and distribution in the overall microstructure, volume fraction, size and morphology of phase constituents, as well as stability of metastable constituents were discussed. Finally, a brief summary of these important steels was highlighted.
Materials, 2021
While the third generation of advanced high-strength steels (3rd Gen AHSS) have increasingly gained attention for automotive lightweighting, it remains unclear to what extent the developed methodologies for the conventional dual-phase (DP) steels are applicable to this new class of steels. The present paper provides a comprehensive study on the constitutive, formability, tribology, and fracture behavior of three commercial 3rd Gen AHSS with an ultimate strength level ranging from 980 to 1180 MPa which are contrasted with two DP steels of the same strength levels and the 590R AHSS. The hardening response to large strain levels was determined experimentally using tensile and shear tests and then evaluated in 3D simulations of tensile tests. In general, the strain rate sensitivity of the two 3rd Gen 1180 AHSS was significantly different as one grade exhibited larger transformation-induced behavior. The in-plane formability of the three 1180 MPa steels was similar but with a stark contr...
High Strength Steel for Automotive Applications
The automobile industry has to meet the demands of fuel efficiency and consumer safety along with stringent government norms. moreover, the factors like air pollution and the weight of the vehicle also needs to be taken into consideration. as a result, the choice of the material becomes a key decision in automobile industry. High Strength Steels(HSS)have proved to be satisfying all the above demands as they offer good balance of low cost, light weight and good mechanical properties.
Advanced High Strength Steels for Light-Weight Automotive
2015
Automotive is an inseparable part of the modern society and accounts for a sizeable share of our economy. It is a complex engineering product today, demanding a combination of properties for its variety of components. Notwithstanding the development of new materials and their increasing use, the iron-base materials still occupy the dominant position amongst the materials of construction of an automobile and represent around 64 percent of the weight, in which the share of steel is around 57 percent in a typical passenger car today. In a passenger vehicle . In a passenger car, the body-in-white (BIW) accounts for ~ 35% of the total weight and is a very demanding area, particularly because it is singularly responsible for the safety of the passenger (against crash).
Safety is paramount importance along with enhancing fuel efficiency of the transport car over the last three decades. Advanced high strength steels play a pivotal role towards achieving the desired structural characteristics of the motor vehicles. Many structural components have been replaced by advanced high strength steels like IF steel, Bake hardening steel, HSLA steel, Micro alloyed steel, Dual Phase steel, Ferrite Bainite steel, Martensitic steel, Hot formed steel, TRIP steel, TWIP steel etc. along with austenitic and ferrite grade stainless steels due to its superior strength and ductility. In the current context it has been attempted to see the causes behind the development of those mentioned steels from conventional to third generation as well the strengthening mechanisms employed towards the development of advanced high strength structural steels. It has been observed from literature study that substantial development have been progressed from metallurgical point of view in this matter over the last decade.
Steel – Material of Choice for Automotive Lightweight Applications
2012
In recent years, for reasons of improved passenger comfort and safety, the weight of passenger cars has continuously increased, leading to higher fuel consumption and greenhouse gas emissions. Since the early 90s competition for safer, lighter, and more fuel economic ground transportation vehicles, triggered by stringent OEMs and governmental demands, led over the years to the market entry of new materials such as new high-strength steels, polymer composites, aluminium alloys, or also magnesium. In this challenging contest of achieving significant emission reductions and fuel economy across all new generation vehicle platforms, the steel industry is today accelerating the implementation of new innovative steels over other emerging materials. The aim of the present contribution is to review the development of novel high strength steels for automotive applications and to highlight their benefits compared to aluminium alloys, as one of their competitor for the automotive lightweight de...
Advanced High-Strength Steels: Science, Technology, and Applications
2013
Advanced High-Strength Steels (AHSS) are the fastest growing material in today's automotive industry and are designed to leverage steel as the optimum automotive material. This book provides a comprehensive account of the structure-property relationship in AHSS. It examines the types, microstructures and attributes of AHSS. It also reviews the current and future applications, the benefits, trends, and environmental and sustainability issues. A compelling feature of the book is its extensive use of property charts and microstructures to simplify visualisation of the resulting attributes of AHSS. This book is intended to be a textbook/reference.
Advances in Manufacturing, 2015
The fast-growing economy and the gradually established highway system have boosted the road transportation for both passenger and cargo over the last decade in China. From 2000 to 2010 Chinese GDP increased by around 10.15% annually and the sales of medium and heavy trucks by around 18.87% (sales increased from 0.2 million in 2000 to 1.3 million in 2010) according to the National Bureau of Statistics of People's Republic of China. Today commercial vehicles consume almost the same amount of fuel as passenger cars in China although the number of commercial vehicles is only about one fourth of passenger cars. It is estimated that around 50% of imported fuel to China each year will be consumed by vehicle transportation. This situation will worsen fuel shortage problems in the long run and at the same time it is partially responsible for the everworsening air pollution in China. Due to the widespread overloading in China, lightweight development in commercial vehicles has fallen far behind that of passenger cars with the consequences that Chinese commercial vehicles consume in average about 20% more fuel, especially the heavy trucks, compared to European models. Under these circumstances it is essential to reduce the vehicle fuel consumption and increase the transport efficiency. The key solution thereby is to implement lightweight design in commercial vehicles as it has been successfully practiced over the last decade in the passenger cars. This paper summarizes highlights given in presentations during the ''International seminar on the application of high strength steels in light weight commercial vehicles'' with the focus on the development and application of Nb alloyed high performance steels made for lightweight commercial vehicles.
RECENT DEVELOPMENTS IN ADVANCED HIGH STRENGTH SHEET STEELS FOR AUTOMOTIVE APPLICATIONS: AN OVERVIEW
In recent years there has been an increased emphasis on the development of new advanced high strength sheet steels (AHSS), particularly for automotive applications driven by needs for vehicle weight reduction to improve fuel economy and for materials which lead to enhanced crash performance and passenger safety. Steels of current interest involve novel alloying and processing combinations to produce unique microstructural combinations and have been referred to by a variety of identifiers including, among others, DP (dual-phase), TRIP (transformation induced plasticity), HSLA (high strength low alloy), CP (complex phase), TWIP (twinning induced plasticity), and martensitic steels. The properties of these multi-phase steels are derived from appropriate combinations of strengthening mechanisms, the basics of which have been well developed in the steel literature. Continued developments of AHSS steels, designed for specific applications, will require careful microstructure control to optimize the specific strengthening mechanisms responsible for the desirable final properties. In this paper recent AHSS developments are examined, and approaches to produce high strength sheet steels with unique strength/ductility combinations are discussed.