Retained ambient temperature properties of superplastically deformed Al-10%Mg-0.1%Zr, Al-10%Mg-0.5%Mn and Al-10%-0.4%Cu alloys.
Klankowski, Karl A.
Hales, Stephen J.
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The room temperature mechanical properties of three superplastic high-Magnesium, Aluminum-Magnesium alloys (Al-10Mg-0- 1Zr, Al-10Mg-0.5Mn, Al-1 OMg-0. 4Cu) were evaluated after simulated superplastic forming at warm temperature. The alloys were initially processed to produce superplastic response. They were then deformed at 300 C to strains of 100 to 200 % at strain rates of 1.7X10ˉ³ Sˉ¹ or 1.7x10 ˉ² Sˉ¹ and samples remachined for ambient temperature testing. Results indicate yield strengths of about 276 Mpa (40 KSI) are attainable with ductility varying from about 1 to 14 percent elongation at fracture. Ultimate strengths correspondingly vary up to about 517 MPa (75 KSI). Origin of the variability in ductility is considered.
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