Stress Corrosion Cracking Behavior of Maraging Steel Composites

Abstract

Laminated plate composites were prepared by hot roll bonding together plates of 18Ni(280) maraging steel and sheets of Armco iron. Composite welds of the same geometry were also prepared by successively depositing weld layers of these two materials. Plane strain stress corrosion tests of these two types of composites in aerated 3.5% NaCl solutions showed that stress corrosion crack propagation was stopped at stress intensities well above the KISCC values of the corresponding homogeneous maraging steel base plate and maraging steel weld metal. The results demonstrate that it is possible to retard stress corrosion crack propagation significantly in both base plate and weld structures by the use of a composite approach.

Effect of Thermal History on Hot Workability of Fe–Cr Multiphase Steel during Hot Working

“…Furthermore, Tomota 16) and Gurland 17) explained that the shape and distribution of the two phases also affected strain distribution behavior and caused changes in strength characteristics and hot workability. The single-phase mechanical properties of duplex stainless steel, which are thought to affect strength and hot workability, were investigated by Floreen, 18) Hayden, 19) and Decker 20) at temperatures lower than room temperature, and it was reported that the strength of the ¤ ferrite phase exceeded that of the austenite phase. On the other hand, McQueen et al 21) reported that the strength of the austenite phase was higher than that of the ¤ ferrite phase under hot conditions at temperatures above 1000°C.…”