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The creep behavior of α 2 Ti-34mol%Al has been investigated at 1050-1250 K under 70-500 MPa. The effect of the initial grain-size in the range 40-130 μm has also been studied. Characteristics of stress and temperature dependence of the minimum creep-rate can be classified into three regions: the stress exponent, the activation energy and the grain-size exponent for the minimum creep-rate...
Two alloys of composition Ti-48Al and Ti-48Al-2Mn-2Nb with lamellar and duplex microstructures, respectively have been crept at 700°C under stresses ranging from 250 to 430 MPa. Although the two alloys have different creep resistance, the stress exponent relating the minimum strain rates and applied stresses was the same, n = 19, for both materials. From the microstructural aspects examined in the...
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