Effects of Annealing Treatments on Superplasticity in a Thermomechanically Processed Aluminum-10.2%Mg-0.52%Mn Alloy PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Effects of Annealing Treatments on Superplasticity in a Thermomechanically Processed Aluminum-10.2%Mg-0.52%Mn Alloy PDF full book. Access full book title Effects of Annealing Treatments on Superplasticity in a Thermomechanically Processed Aluminum-10.2%Mg-0.52%Mn Alloy by Alta Fern Stengel. Download full books in PDF and EPUB format.
Author: Alta Fern Stengel
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Alta Fern Stengel
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: A. F. Stengel
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
Get Book Here
Book Description
This research follows previous thesis work by Becker and Mills on superplastic behavior of a warm rolled Al-10.2%Mg-0.52%Mn alloy. Elongations of up to 391% were reported to them for tension testing at 300 C and a strain rate of .0014/s. In this work, material was warm rolled at 300 C to 94% reduction and then subjected to one of five subsequent annealing treatments: 1 hour at 200 C, 10 hours at 200 C, 1/2 hour at 250 C, 1 hour at 250 C, or 1/2 hour at 440 C (to recrystallize the material). Tension testing at temperatures ranging from 300 C to 425 C was then conducted. Annealing below the rolling temperature enhances superplastic behavior when compared to the as rolled condition. For example, material warm rolled at 300 C with a strain rate of .0056/s gave a ductility of 572%. Annealing, however, for 1/2 hour at 440 C results in a recrystallized structure which is stronger than the as-rolled condition and less ductile when tested at 300 C. Originator's supplied keywords include: aluminum, aluminum-magnesium, grain refinement, precipitation, cavitation, grain boundary sliding.
Author: Max E. Mills
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 116
Get Book Here
Book Description
This research extended the previous work performed by Becker on the elevated temperature deformation characteristics of an aluminum-10.2% magnesium-0.52% manganese alloy. The alloy was warm rolled at 300 C to 94% reduction. Stress-strain testing was utilized to collect data for stress vs strain rate and ductility vs strain rate, as well as, stress exponents and activation energies. Tensile testing was performed at strain rates at .000139 per sec. and temperatures from 20 C to 425 C. Ductility ranged from 400% at 300 C and 600% at 325 C to 700% at 425 C. The data clearly establishes that the warm rolled alloy is superplastic at temperatures as low as 275 C and may exhibit superplastic elongations (greater than 400%) at strain rates at high as .01 per sec at 325 C. Scanning electron microscope observations indicated little or no void formation at or below 300 C. The high ductilities observed at temperatures above the solvus are the result of grain boundary sliding. Originator-supplied keywords included: Superplasticity, Aluminum, Aluminum alloys, Aluminum-magnesium, Thermo-mechanical processing, Rolling, Warm rolling, Annealing recrystallization, Grain Refinement, Precipitation, Cavitation, Grain boundary sliding, Computer programs, Fortran, Theses.
