Strain rate sensitivity of hot deformed Al and AlMgSi alloy

Błaż, L.; Evangelìsta, E.

doi:10.1016/0921-5093(95)10038-5

Cited by 33 publications

(24 citation statements)

References 12 publications

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“…In general, the values are lower than 0.045, and agree with the values calculated in Ref. [18] for the same deformation and dynamic recovery situation. No superplastic flow occurs due to the impossibility of grain sliding, and this is also confirmed by the low values of m and the premature fracture of the sample.…”

Section: Discussionsupporting

confidence: 90%

“…The strain rate sensitivity m for aluminium at temperatures in the range 300-500°C, where dynamic recovery takes place, was reported for coarse grains to be around 0.17-0.25 [14] and 0.005-0.14 [18] for 0.5 and 0.05 of true strain, respectively. Fine-grained structures promote superplastic flow by grain boundary sliding [19] in fully recovered grains yielding a value of m of around 0.4 [20].…”

Section: Introductionmentioning

confidence: 99%

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High-temperature strength of compacted sub-micrometer aluminium powder

et al. 2010

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

High-temperature strength of compacted sub-micrometer aluminium powder

et al. 2010

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“…The strain-rate sensitivity and strain-hardening rate are observed to be associated with a number of parameters such as the specimen geometry (Ref 2-4), grain size (Ref 4-7), strain level (Ref [8][9][10][11][12][13], and strain rate (Ref [8][9][10][11][12][13][14][15][16][17]. Some inconsistent results regarding the effect of these parameters have been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Strain Hardening and Strain-Rate Sensitivity of an Extruded Magnesium Alloy

Lin

Chen

2008

J. of Materi Eng and Perform

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The strain-hardening behavior and strain-rate sensitivity of an extruded AZ31B magnesium alloy were determined at different strain rates between 10 -2 and 10 -5 s -1 in relation to the thickness of specimens (2.5 and 4.5 mm). Both the common approach and LindholmÕs approach were used to evaluate the strain-rate sensitivity. The yield strength (YS) and the ultimate tensile strength (UTS) increased, the ductility decreased, and the brittle fracture characteristics increased with increasing strain rate. The thinner specimens exhibited a slightly higher UTS, lower ductility, higher strain-hardening exponent, and strainhardening rate due to smaller grain sizes. The stage III strain-hardening rate linearly decreased with increasing true stress, but increased with increasing strain rate. In comparison to the common approach, the LindholmÕs approach was observed to be more sensitive in characterizing the strain-rate sensitivity due to larger values obtained. The thinner specimens also exhibited higher strain-rate sensitivity. As the true strain increased, the strain-rate sensitivity decreased.

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“…[13] For hot torsion tests performed on AA6061, m % 0:05 at 473 K (200°C) and m % 0:08 at 573 K (300°C) were reported by Semiatin et al [14] From tensile tests, Abedrabbo et al [15] reported m = 0.045 at 477 K (204°C) and m = 0.080 at 533 K (260°C) for AA3003-H111. From the data of Reference 16, we calculated m = 0.115 for AA3103 and m = 0.071 for pure aluminum at 623 K (350°C).…”

Section: B Tensile Test Resultsmentioning

confidence: 76%

Tensile, Fatigue, and Creep Properties of Aluminum Heat Exchanger Tube Alloys for Temperatures from 293 K to 573 K (20 °C to 300 °C)

Kahl

Ekström²,

Mendoza³

2013

Metall Mater Trans A

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Since automotive heat exchangers are operated at varying temperatures and under varying pressures, both static and dynamic mechanical properties should be known at different temperatures. Tubes are the most critical part of the most heat exchangers made from aluminum brazing sheet. We present tensile test, stress amplitude-fatigue life, and creep-rupture data of six AA3XXX series tube alloys after simulated brazing for temperatures ranging from 293 K to 573 K (20°C to 300°C). While correlations between several mechanical properties are strong, ranking of alloys according to one property cannot be safely deduced from the known ranking according to another property. The relative reduction in creep strength with increasing temperature is very similar for all six alloys, but the general trends are also strong with respect to tensile and fatigue properties; an exception is one alloy that exhibits strong Mg-Si precipitation activity during fatigue testing at elevated temperatures. Interrupted fatigue tests indicated that the crack growth time is negligible compared to the crack initiation time. Fatigue lifetimes are reduced by creep processes for temperatures above approximately 423 K (150°C). When mechanical properties were measured at several temperatures, interpolation to other temperatures within the same temperature range was possible in most cases, using simple and wellestablished equations.

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Strain rate sensitivity of hot deformed Al and AlMgSi alloy

Cited by 33 publications

References 12 publications

High-temperature strength of compacted sub-micrometer aluminium powder

High-temperature strength of compacted sub-micrometer aluminium powder

Strain Hardening and Strain-Rate Sensitivity of an Extruded Magnesium Alloy

Tensile, Fatigue, and Creep Properties of Aluminum Heat Exchanger Tube Alloys for Temperatures from 293 K to 573 K (20 °C to 300 °C)

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