Author : L. S. Fu
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (227 download)
Book Synopsis Quasi-Static Crack Growth in Metals at Elevated Temperature - A Review by : L. S. Fu
Download or read book Quasi-Static Crack Growth in Metals at Elevated Temperature - A Review written by L. S. Fu and published by . This book was released on 1979 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The literature on fatigue and sustained load crack growth in metals at elevated temperature is examined within the framework of fracture mechanics. Fatigue crack growth (FCG) rates are found to be frequency dependent. A transition from transgranular to intergranular failure modes is noted as frequency decreases. The time-dependent effect on FCG rates comes from oxidation damage and creep crack growth. In extrapolating the low-cycle fatigue laboratory test data to service conditions, the interaction with creep and oxidation can drastically modify the predicted behavior. Quasi-static crack growth is observed at elevated temperature at stress intensity levels well below the materials fracture toughness. Empirical results and theoretical models for prediction of initiation and growth of cracks are critically reviewed. Results are not conclusive as to which fracture parameter should be used for prediction. Guidelines are given for further studies in this area.