کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1665423 | 1518046 | 2014 | 4 صفحه PDF | دانلود رایگان |
• Exceptional room temperature strength (2 GPa) and ductility after aging
• Sputtered superalloy had a similar composition as the target.
• Film was essentially quenched from the vapor forming a solid solution.
• Heat treatment resulted in unique precipitation pathways.
• Small grain size contributed to mechanical properties and precipitation.
Nickel-base superalloy 718 films have been sputter deposited to thicknesses of 20 μm. These as-deposited films were single-phase nanocrystalline solid solutions, which possessed tensile strengths of 1 GPa but negligible ductility. Standard 718 aging heat treatments resulted in modest grain growth, atypical precipitation behavior, significant ductility, and impressive strengths at both ambient (2 GPa at 25 °C) and elevated (750 MPa at 700 °C) temperatures. The density of grain boundaries was shown to have a dramatic effect on the precipitation pathways of this alloy.
Journal: Thin Solid Films - Volume 558, 2 May 2014, Pages 20–23