9-Elevated Temp & Fracture

Material strain hardens to support the applied load

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ogressively decrease with time. Material strain hardens to support the applied load. As further strain hardening becomes difficult strain rate decreases. Strain rate = Creep rate = dε dt STAGES OF CREEP Secondary creep Creep rate is essentially constant Steady state creep. Recovery processes involve highly mobile dislocations counteract strain hardening. Creep resistance is highest. Slope of the creep curve in this stage is referred to as minimum creep rate. Creep Behavior as a Function of Stress and Temperature CREEP RATE INCREASES AS: Stress increases Temperature increases STAGES OF CREEP Tertiary creep Creep rate rapidly increases with time up...
View Full Document

Ask a homework question - tutors are online