Document Type

Article

Publication Date

7-22-2008

Journal or Book Title

Journal of Manufacturing Science and Engineering

Volume

130

Issue

4

First Page

041017

DOI

10.1115/1.2953235

Abstract

Increasing demands for miniature metallic parts have driven the application of microforming in various industries. Only a limited amount of research is, however, available on the forming of miniature features in high strength materials. This study investigated the forming of microfeatures in Type 304 stainless steel by using the coining process. Experimental work was performed to study the effects of workpiece thickness, preform shape, grain size, and feature size on the formation of features ranging from 320μmto800μm. It was found that certain preform shapes enhance feature formation by allowing a favorable flow of the bulk material. In addition, a flow stress model for Type 304 stainless steel that took into consideration the effects of the grain and feature sizes was developed to accurately model and better understand the coining process. Weakening of the material, as the grain size increased at the miniature scale, was explained by the Hall–Petch relationship and the feature size effect.

Comments

This article is from Journal of Manufacturing Science and Engineering 130 (2008): 041017, doi:10.1115/1.2953235. Posted with permission.

Copyright Owner

ASME

Language

en

File Format

application/pdf

Included in

Manufacturing Commons

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