Table of Contents
Textures and Microstructures
Volume 13, Issue 4, Pages 243-260
http://dx.doi.org/10.1155/TSM.13.243

The Compound Influence of Texture and Microstructure on the Mechanical Properties of Low-C Steel Wires

Department of Mining and Metallurgical Engineering McGill University, Montreal H3A 2A 7, Canada

Received 18 July 1990; Accepted 21 September 1990

Copyright © 1991 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A series of experiments were made determining textural, microstructural, and mechanical properties in cold drawn, and spheroidization heat treated low-C steel wires (AISI-1018 and 1033 grades). It was found that texture exerted a significant influence on the mechanical properties, while microstructure had a comparable influence.

Mechanical properties are represented by yield strength (YS), ultimate compressive strength (UCS) and by homogeneous strain energy (EHOM), defined by the integral of stress up to uniform elongation. Textural properties are represented by the Taylor-factor, M, the R-value, and by the maximum of the orientation distribution function (ODFMAX). Micro-structural properties are treated with the help of the aspect ratio parameter (1/√AR), where AR is the grain aspect ratio (length to ellipsoidal width), the grain size parameter (1/√D), and the mean free path between second phase spheroidized cementites √N.

For cold drawn steel wires, homogeneous strain energy (EHOM) is well correlated to (1/√AR) and (ODFMAX). Yield strength, on the other hand, appears to be chiefly influenced by the aspect ratio parameter, thus here ODFMAX exerts less influence. The yield strength (YS) of annealed, spheroidization treated low-C wires are equally influenced by the grain size parameter (1/√D), the mean distance between spherulites (√N) and by ODFMAX.

The textures of the cold drawn wires could be well described by the 110 fibre parallel to wire axis, and by the 111 fibre normal to wire axis. The annealed wires, while also featuring these two fibres, displayed a distinct {111}110single orientation.