PART XI – November 1967 - Communications - The Dependence of the Hardness of Cartridge Brass on Grain Size
- Organization:
- The American Institute of Mining, Metallurgical, and Petroleum Engineers
- Pages:
- 2
- File Size:
- 672 KB
- Publication Date:
- Jan 1, 1968
Abstract
TABOR1 has indicated for a number of polycrystal-line materials that their hardness should be directly related to their yield strength. For a material showing zero work-hardening, the Meyer hardness, MH, may be calculated in terms of the yield stress, sy, by utilizing slip line theory and the result is: The Meyer hardness corresponds to indenting the surface with a spherical indenter and specifying the ratio of load and projected area of the indentation. The correlation indicated by Eq. [I] is not well-established. It has been verified to some degree by performing hardness tests on materials strained to the maximum nominal stress and taking this stress as the (new) yield stress of a nonwork-hardening material. The dependence of hardness on yield strength for an annealed material capable of showing work-hardening has not been theoretically evaluated but, presumably, the hardness should be greater than that specified above. Marcinkowski, Fisher, and szirmae2 measured the dependence of the Vickers Diamond Pyramid hardness, H,, on yield strength for an annealed Fe-Cr alloy which shows work-hardening and found:
Citation
APA: (1968) PART XI – November 1967 - Communications - The Dependence of the Hardness of Cartridge Brass on Grain Size
MLA: PART XI – November 1967 - Communications - The Dependence of the Hardness of Cartridge Brass on Grain Size. The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1968.