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Residual Stress
Conferences |
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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)
- 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.
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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:
FEM Model, Front surface (surface that was cut) is deformed
into opposite shape of measured contour
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