Development of Advanced High Strength Steel for Improved Vehicle Safety, Fuel Efficiency and CO2 Emission

Abstract

Global warming and green house gas emissions are the major issues worldwide and their impacts are clearly visible as a record high temperatures, rising sea, and severe 'flooding and droughts'. Motor vehicles considered as a major contributor on global warming due to its green house gas emissions. Hence, the automobile industries are under tremendous pressure from government and society to reduce green house gas emission to maximum possible extent. In present work, Dual Phase steel with boron as microalloying is manufactured using thermo-mechanical treatment during hot rolling. Dual phase steel with boron microalloying improved strength by near about 200 MPa than dual phase steel without boron. The boron added dual phase steel can be used for manufacturing stronger and a lighter vehicle which is expected to perform positively on green house gas emissions. The corrosion resistance behavior is also improved with boron addition which would further increase the life cycle of the vehicle even under corrosive atmosphere.

Pulse spray gas metal arc welding of advanced high strength S650MC automotive steel

“…But the higher is the strength; the lower is the formability and weldability of conventional HSS. AHSS has a unique combination of good formability and weldability along with very high strength [3]. In the past, AHSS was defined based on strength only, such as YS > 550 MPa.…”

Evolution of Microstructural and Mechanical Properties of Fiber Laser Welded Dual Phase Steels

“…The necessity for the adaption of a new class of materials in the automotive industry has increased over the past decade to meet the modern environmental legislative regulations by controlling greenhouse gas emissions, to improve the passenger safety by improving the crashworthiness under dynamic loading, and to improve fuel efficiency by adapting lighter material [1,2]. Advanced High Strength Steels [AHSS] are the candidate material suitable for the automotive industry to meet these requirements.…”