Date of Award
Fall 1974
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Mechanical Engineering
First Advisor
Fournell, Raymond
Second Advisor
Hirthe, Walter M.
Third Advisor
Blumethal, Robert
Abstract
The yield strength of annealed low alloy steels is a function of several microstructural variables such as grain size and second phase particle dispersions as well as solutes in solid solution and substructure effects, dislocation density, and twinning. The purpose of this research is to quantitatively determine the contribution of each factor to the yield strength and express these contributions in equation form. The alloys under investigation are a ferritic and martensitic, copper precipitation hardening steels heat treated to the peak age condition for several varying microstructures of each alloy. Measurements of grain size, martensitic lath width and carbide spacing are obtained through light and electron microscopic techniques while the remaining contributions to the yield strength are taken from data supplied in the literature. It was found that the yield strength of the ferritic steel is proportional to the reciprocal square root of the grain size and can be expressed by an equation of the form: "formula"...
Recommended Citation
Marmes, Mark C., "Strengthening Mechanisms in 0.003%C-1.5%Cu and 0.3%C-1.5%Cu Steels" (1974). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4768.
https://epublications.marquette.edu/theses/4768