Experimental Mechanics

, Volume 27, Issue 1, pp 80–85 | Cite as

Residual stresses in turned AISI 4340 steel

  • A. B. Sadat
  • J. A. Bailey
Article

Abstract

The residual-stress distribution in the surface region of workpieces of annealed AISI 4340 steel that is turned under unlubricated conditions is determined using a deflection etching technique. The absolute value of the residual stresses at the machined surface are low and increase with an increase in depth beneath the machined surface to a maximum. They then decrease with a further increase in depth eventually becoming vanishingly small. Peak residual stresses are tensile at cutting speeds of 0.5 and 1.0 ms−1 and are compressive at a cutting speed of 1.5 ms−1 for all feed rates and depths of cut. Peak residual stresses and depth of the stressed region increase with an increase in feed rate and depth of cut, but decrease with an increase in cutting speed. The results of this investigation can be interpreted in terms of the variation of tool forces with cutting conditions.

Keywords

Mechanical Engineer Residual Stress Fluid Dynamics Feed Rate Machine Surface 

List of Symbols

E

modulus of elasticity

I

moment of inertia

R

mean radius of ring

M0

relieved moment

t0

original thickness of ring

n

designated layer (1, 2, 3, etc.)

dt

layer thickness

\(\delta _o \)

deflection due to sectioning of ring

\(\delta _n \)

deflection of the ring whennth layer is removed by etching

\(\sigma _{1,n} \)

residual stress relieved due to cutting of the ring

\(\sigma _{2,n} \)

residual stress relieved in a layer removed by etching

\(\sigma _{3,n} \)

residual stress relieved due to removal of previous layers

\(\sigma _{T,n} \)

total residual stress in thenth layer

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Copyright information

© Society for Experimental Mechanics, Inc. 1987

Authors and Affiliations

  • A. B. Sadat
    • 1
  • J. A. Bailey
    • 2
  1. 1.Department of Mechanical EngineeringUniversity of Texas at ArlingtonArlington
  2. 2.Department of Mechanical and Aerospace EngineeringNorth Carolina State UniversityNorth CarolinaUSA

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