Temperature Dependence of the Flow Stress of Body-Centered-Cubic Metals

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.184.137 ◽

2012 ◽

Vol 184 ◽

pp. 137-142

Author(s):

Milan J. Konstantinović

Keyword(s):

Flow Stress ◽

Temperature Dependence ◽

Dislocation Motion ◽

Relaxation Processes ◽

Anomalous Temperature ◽

Cubic Metals ◽

Cu Alloys ◽

Tensile Data ◽

Cr Concentration ◽

Internal Friction Spectra

By comparing the properties of dislocation-related relaxation processes in internal friction spectra and the tensile data of various iron alloys, we found that the temperature dependence of the flow stress is governed by the total distribution of the activation energies of dislocation motion. The derived model explains the origin of an anomalous temperature dependence of the flow stress in thermally aged Fe-1%Cu alloys, and Fe-x%Cr alloys as a function of Cr concentration, as well as the non-uniform temperature dependence of the flow stress in pure Fe.

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Anomalous temperature dependence of flow stress in a Fe3Al alloy

Scripta Materialia ◽

10.1016/s1359-6462(99)00362-0 ◽

2000 ◽

Vol 42 (3) ◽

pp. 271-276 ◽

Cited By ~ 10

Author(s):

Jin-Hwa Song ◽

Tae Kwon Ha ◽

Young Won Chang

Keyword(s):

Flow Stress ◽

Temperature Dependence ◽

Anomalous Temperature Dependence ◽

Anomalous Temperature ◽

Fe3al Alloy

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The plasticity and cleavage of polycrystalline beryllium I. Yield and flow stresses

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1980.0019 ◽

1980 ◽

Vol 370 (1740) ◽

pp. 17-27 ◽

Cited By ~ 4

Keyword(s):

Grain Size ◽

Flow Stress ◽

Dislocation Density ◽

Temperature Dependence ◽

Yield Stress ◽

Dislocation Motion ◽

Orientation Factor ◽

High Rigidity ◽

Rigidity Modulus

The dependence of the yield and flow stresses of vacuum-cast and extruded polycrystalline beryllium on the grain size, d, is studied over 20-400 °C. Both follow the standard d -1/2 relationship. The Taylor orientation factor in the deformation of the poly crystal is ca. 4.3. The marked temperature dependence of the yield stress between 20 and 200 °C arises primarily from the intragranular resistance to dislocation motion, in particular on prismatic planes. The variation of the flow stress with d1/2 increases progressively with strain and this is attributed to the effect of grain size on the dislocation density at a given strain; the increase is particularly marked for beryllium because of its high rigidity modulus.

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On the temperature dependence of the flow stress in some body-centered cubic metals

Scripta Metallurgica ◽

10.1016/0036-9748(69)90274-9 ◽

1969 ◽

Vol 3 (3) ◽

pp. 153-155 ◽

Cited By ~ 4

Author(s):

P Soo ◽

J.M Galligan

Keyword(s):

Flow Stress ◽

Temperature Dependence ◽

Body Centered Cubic ◽

Cubic Metals

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The Temperature Dependence of the Mechanical Properties of Gamma TiAl

MRS Proceedings ◽

10.1557/proc-364-629 ◽

1994 ◽

Vol 364 ◽

Cited By ~ 3

Author(s):

B. Viguier ◽

J. Bonneville ◽

K. J. Hemker ◽

J. L. Martin

Keyword(s):

Mechanical Properties ◽

Flow Stress ◽

Strain Rate ◽

Temperature Dependence ◽

Single Crystals ◽

Strain Rate Sensitivity ◽

Rate Sensitivity ◽

Dislocation Motion ◽

Compression Tests ◽

Wide Range

AbstractMechanical properties of a polycrystalline single phased γ Ti47Al51Mn2 alloy were studied by compression tests in a wide range of temperature (100 K - 1300 K). We report, in this paper, the temperature dependence of both the flow stress and its strain rate sensitivity. These dependencies show the existence of three temperature domains corresponding to different dislocation motion mechanisms. The temperature dependence of the flow stress strain rate sensitivity is compared with values measured in single crystals1.

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