Authors: Umemoto, M.¹; Liu, Z.G.¹; Tsuchiya, K.¹; Sugimoto, S.¹; Bepari, M.M.A.²

Source: Materials Science and Technology, Volume 17, Number 5, May 2001 , pp. 505-511(7)

Publisher: Maney Publishing

Abstract:

An attempt has been made to establish a relationship between hardness and tensile properties for various single structured steels: ferrite, pearlite, bainite, and martensite. It is found that the proportionality constant A _Y of hardness to yield strength changes from 5.79 to 3.17 and is highest for the ferrite steel and lowest for the tempered martensitic steels. A less pronounced change was found in the proportionality constant A _T of hardness to tensile strength (from 3.97 to 2.72). A dependence on microstructure of the proportionality constant at 8% strain A _0.08 was found as well. This difference in A was found to be attributable mostly to the effect of different work hardening behaviours owing to different microstructures. Regression analysis shows that hardness can be expressed as a function of accessible material parameters such as composition, grain size, and transformation temperatures for various single structured steels within a certain degree of accuracy.

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1179/026708301101510339

Affiliations: 1: The Department of Production Systems Engineering, Toyohashi University of Technology, Tempaku­cho, Toyohashi, 441–8580, Aichi, Japan 2: The Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dacca, 1000, Bangladesh

Publication date: 2001-05-01

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