![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
All stresses, and particularly those due to friction, which occur during pressing and sizing operations have consequences on the dimensions, on internal stresses, and eventually on micro-cracks. This friction can have an influence on the variations of the density from one point to another but, when used in a proper way, it can help the movement of punches and increase homogeneity. Three different types of re-pressing are considered—drawing, sizing, and coining—and examples are given to show their influence on mechanical properties and especially on the fatigue limit.
Notes
* Manuscript received 11 November 1974. Contribution to a Symposium on ‘Factors Affecting the Uses of PM Products’, held in Eastbourne on 28–30 October 1974.