Nobuhiro Fujita

TL;DR: A method of fatigue life prediction of spot welded joint under multi-axial loads has been developed by fatigue life estimation working groups in the committee on fatigue strength and structural reliability of JSAE as mentioned in this paper.

TL;DR: In this paper, the authors proposed a steel sheet that prevents deterioration in the material of a welded joint without damaging its formability for the purpose of being applied, e.g. to automotive parts requiring the good mechanical properties of a welding joint.

TL;DR: A heat-resistant ferritic stainless steel for use as a high-temperature member such as the material of an automotive exhaust system, which is reduced in the total content of free C and free N and which secures the amount of solid solution of W, Nb and Mo to secure solid solution hardening and hightemperature salt injury resistance effectively for long, whereby the high temperature strength can be held both at the initial stage and in mid-course of its use as mentioned in this paper.

TL;DR: In this article, the authors proposed a solution to suppress the formation of oxide scale when a steel tube having a zinc-based coating is subjected to reduction working at a relatively high temperature, and suppress the occurrence of plating defects at the reduction working, the sticking and galling of the steel tube to the reduction roll, or the like.

TL;DR: In this paper, the authors proposed a steel sheet with a composition comprising, by mass, 0.06 to 0.30% C, ≤2.0% Si, 0 1.4×[N]>0, and also, the number of boundary nitrides with a diameter of the equivalent circle of ≤50 nm is ≤140 pieces per μm 2 of grain boundary.