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Applications: Quenched Steel Plate

 
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Residual Stress
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paper on these measurements. "Residual Stresses Measured in Quenched HSLA-100 Steel Plate," (LA-UR-05-1265)

Results: Typical Quenching Residual Stresses. Over cross-section of plate (residual axial (z) stress in MPa)

Quenching stresses

  • Away from edges, the through-thickness residual-stress profile can be approximated by this curve
  • This is the usual compression-tension-compression distribution that one sees from quenching
  • The stresses in the 2-D map (above) are different near the edges because the test piece was cut after quenching from a larger plate. The cutting changed some stresses near the edges.
Plot of through-thickness stress profile

Quenched Plate of HSLA-100 Steel

  • Low carbon, copper precipitation hardened, High-Strength Low-Alloy steel: HSLA-100
  • Hot cross-rolled
  • Ausenitized at 900 ºC for 75 minutes, water quench
  • Tempered at 660 ºC for 200 minutes, water quench
  • 61 mm thick
  • Yield stress: 690 MPa (100ksi)

Measurement Details

  • Cut in Mitsubishi FX-10 wire EDM with 150 µm (0.006") diameter brass wire.
  • Surface contour measured using MS Impact II CMM.
  • Stresses calculated by applying opposite of measured contour to FEM model:

deformed finite element model
FEM Model, Front surface (surface that was cut) is deformed into opposite shape of measured contour

 

 

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contact: Mike Prime at prime@lanl.gov | Copyright & Disclaimer
U.S. patent 6,470,756 | Last Modified: March 12, 2007

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