University of Illinois Urbana-Champaign

Optimum hardness for maximum fatigue strength of steel

Morrow, JoDean; Halford, G.R.; Millan, J.F.

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https://hdl.handle.net/2142/112011

Description

Title
Optimum hardness for maximum fatigue strength of steel
Author(s)
  • Morrow, JoDean
  • Halford, G.R.
  • Millan, J.F.
Issue Date
1966-05
Keyword(s)
  • Hardness
  • Fatigue Strength
  • Steel
Abstract
Observations relating to an optimum hardness for maximum fatigue strength of steels are reviewed. Data are presented to illustrate the influence of hardness on the mechanical behavior of SAE 1045 steel. Suggested causes for decreased strength and ductility at high hardness are discussed, and the idea is advanced that a transition from shear to tensile governed failure takes place as hardness increases. Resistance to shear stress is envisioned as increasing with hardness while the resistance to tensile stress decreases causing a sharp drop in ductility and strength. This view of the fatigue resistance of hard steels suggests ways to improve performance of hard steels permitting the full strength of potential to be realized.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 288
  • 1966-0445
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112011
Copyright and License Information
Copyright 1966 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.