Fatigue resistance and influence of cutting technology on the mechanical properties of modern steels used in the automotive industry

Automotive industry is the one of the most rapidly developing sector of engineering. Using of new, progressive materials can make significant benefits because of growing durability and reducing weight of structural parts, which can lead to the materials and fuel savings. In this article authors present basic mechanical properties of high strength low alloyed steel (HSLA) and compares several types of different cutting technics in terms of changing mechanical properties in the areas near the cuts. The fatigue properties of Hardox 400 steel in the high and ultrahigh-cycle range were determined also. Authors compares results of their own experimental works and subsequently discus these result and their possible effect on the design process. The paper includes analysis of application possibilities new types steels in the design of structural parts of semi-trailers chassis. (C) 2017 The Authors. Published by Elsevier Ltd.