Strength of the Surface Layer of Mild Steel

[+] Author and Article Information
H. Sasaki

Department of Mechanical Engineering for Production, Tokyo Institute of Technology, Tokyo, 152 Japan

Y. Sato

Department of Mechanical Engineering, College of Engineering, Nihon University, Tamura-cho, Kooriyama City, Fukushima Prefecture, 963 Japan

J. Eng. Mater. Technol 103(4), 282-286 (Oct 01, 1981) (5 pages) doi:10.1115/1.3225017 History: Received October 20, 1980; Online September 15, 2009


The load-strain curves of thin-walled hollow cylinders of mild steel under compression, bending or torsion and rectangular cross-sectional beams with small height under bending deviate from the elastic line before reaching the lower yield point. In this paper these experimental results are attributed to yielding of the surface layer of the material. It is concluded that the surface yeild stress is 3/4 of the inherent yield stress of bulk material under uniform stress such as simple tension or compression.

Copyright © 1981 by ASME
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