Author : M. J. Koczak
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (227 download)
Book Synopsis A Fundamental Study of Fatigue in Powder Metallurgy Aluminum Alloys by : M. J. Koczak
Download or read book A Fundamental Study of Fatigue in Powder Metallurgy Aluminum Alloys written by M. J. Koczak and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue response in high strength powder metallurgy aluminum alloys is being evaluated; the primary objective is to establish and understand processing-microstructure-fatigue integrity relationships. The program includes stress-controlled low and high cycle response and a determination of crack propagation rates in both air and saline environments. In scope, there are two concurrent phases of research; in one, the combined effects of powder processing mode and cobalt level (0, 0.4, 0.8%) on fatigue are examined while in the other, cobalt level is kept constant (0.4%) but the powder alloy is processed to give differing but known/controlled levels of deformation (material flow) by forging. S-N curves for axial fatigue (R equal to 0.1) in air reveal a strong influence of processing mode on life in alloys containing cobalt. Anisotropy in fatigue response is observed for each condition of cobalt level and processing mode examined; the degree of anisotropy is a function of processing mode if cobalt is present.