low carbon steel samples were both shot into and inoculated with titanium in order to improve mechanical properties such as strength and toughness. sem observations and x-ray analyses revealed that titanium nitride and titanium carbonitride precipitates being scattered in the ferrite substrate reduce the grain size in all as-cast, heat-treated and as-rolled cases. the growth of the grains at hi...

Short cracks, extending to the interdiffusion zone, have been observed in platinum-modified nickel-aluminide diffusion coatings on single-crystal CMSX-4 superalloys after these have been subject to short (10 min) rapid thermal cycles. The cracks were revealed after removing the thermally grown oxide formed during cycling on the coating surfaces. Cracking was observed for coatings subject to the...

Gamma titanium aluminide (γ-TiAl) is considered a high-performance, low-density replacement for nickel-based superalloys in the aerospace industry due to its high specific strength, which retained at temperatures above 800 °C. However, low damage tolerance, i.e., brittle material behavior with propensity rapid crack propagation, has limited application of γ-TiAl. Any cracks introduced during ma...

The oxidation performance of a single-phase Pt-modified aluminide coating was assessed in test at 980 °C comparison with the single crystal superalloy. results suggested that exhibited superior resistance. During oxidation, oxide scale formed on bare alloy changed constantly followed by constitution multi-layer structure: An outer mainly consisted Cr2O3 + NiCr2O4 TiO2 scarce protection, and an ...