نتایج جستجو برای: superplastic forming
تعداد نتایج: 114856 فیلتر نتایج به سال:
The two-sheet hollow structure of the 1420 Al-Li alloy was prepared by method superplastic forming and diffusion bonding. interface combination status bonding region microstructure were observed an optical microscope. thickness distribution measured ultrasonic meter machine, defect detection tested X-ray nondestructive inspection, failure modes samples analyzed. results showed that successfully...
To produce carbonate apatite (CAP) ceramics with the desired complex shapes using superplastic deformation, deformation behavior of CAP ceramics under constant loading as well as physical properties after deformation were evaluated. Sintered CAP ceramics were plastically deformed in an electric furnace attached to a universal hydraulic testing machine under a constant load. CAP ceramics subject...
Glasses are usually shaped through the viscous flow of a liquid before its solidification, as practiced in glass blowing. At or near room temperature (RT), oxide glasses are known to be brittle and fracture upon any mechanical deformation for shape change. Here, we show that with moderate exposure to a low-intensity (<1.8×10(-2) A cm(-2)) electron beam (e-beam), dramatic shape changes can be ac...
Missing strain,” a discrepancy between the total macroscopic strain and the strain contributed by grain boundary sliding (GBS) during superplastic deformation, appears to exist in previous investigations. In this work, the contribution of GBS (ξGBS) and intragranular strain (ξIG) were simultaneously measured using scratch test conducted on AA7475 samples after deformation at 500 °C at initial s...
In metal forming processes, the behavior of the metals undergoing large plast~c deformation is atyected by the dynamic or strain rate effects of the material and inertia effect. Since both of' the matenal and mechanical effects are correlated each other in the forming processes, they are effectively treated by rhe finite element methods which can take account of strain rate effect. Usually the ...
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