Retained Ambient Temperature Properties of Superplastically Deformed Al-10%Mg-0.1%Zr, Al-10%Mg-0.5%Mn and Al-10%Mg-0.4%Cu Alloys.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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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-10Mg-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 stains of 100 to 200 at strain rates of 1,700 S or 170 S 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 of the ductility is considered.
- Metallurgy and Metallography