Creep Fracture Mechanisms and Maps in Aisi Type 316 Austenitic Stainless Steels from Distinct Origins

Abstract

Two distinct AISI type 316 stainless steels, of Brazilian and Swedish origins, were compared regarding their creep fracture mechanisms at 600, 700 and 800°C. The possible mechanisms associated with the creep fracture strength were identified by means of fracture maps proposed either by Ashby and collaborators or by Miller and Langdon. Experimental creep results were consistent with the general Ashby and collaborators map for face centered cubic alloys. By contrast, the two different 316 steel displayed significant differences in the model-based map of Miller and Langdon. In the present work, changes in the maps frontier are proposed as well as the introduction of a new field in the map related to grain boundary precipitation. These propositions allowed the Miller and Langdon map to be coherent with the experimental creep fracture results of both 316 stainless steels.

Investigation on dry machining of stainless steel 316 using textured tungsten carbide tools

“…parameters using a non-textured or plain cutting tool and the values of responses found are R a -4.526 μm and MRR-105 187 mm 3 min −1 . Since, it is known that the values of MRR as obtained using equation (1), which is same in case of both, textured and plain tools. Therefore, to assess cutting tool (textured and non-textured) performances, machining parameter combinations for maximum and minimum roughness at run numbers 22 and 24 respectively have been considered to make further comparison.…”

“…There are different grades of stainless steel used to fulfil specific application requirements. Austenitic chromium-nickel stainless steel SS316 is a prime candidate material for heat exchangers, furnace parts, jetengine parts, and chemical processing and pharmaceutical equipment etc [1,2]. Excellent toughness, superior strength, and high corrosion resistance etc are the special characteristics of SS 316.…”

Controle Da Vida Remanescente Em Equipamentos Industriais Que Operam Em Condições De Fluência

“…Este é caracterizado por uma taxa de deformação sempre crescente. Vários são os modos de fratura em condições de fluência e seus campos de ocorrência podem ser igualmente caracterizados através de mapas de fratura [13].…”