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-treatment were used for the grain refinement of GH4169 superalloy plate. The effects of cold rolling reduction ratio and heat-treatment time on the precipitated δ phase, and the effects of δ-phase... from the δ-Ni3Nb phase to the δ-NbNi4 phase. The comprehensive properties of the alloy are better when the heat treatment time is 1 h, with 132 MPa increase in the tensile strength and only 2.9......
different homogenization heat treatment, one at temperature below the melting point of pseudo-eutectic (MPPE, 539 ℃) and another include treating below MMPE followed by treating above MPPE... the homogenization heat-treatment at 520 ℃, but some rare-earth-rich particles remain. While after the further homogenization heat-treatment at 560 ℃, the amount of rare-earth particles decreases dramatically......
of the coatings were analyzed, respectively, by X-ray diffractrometry and Scanning electron microscopy before and after heat-treatment. The influence of heat-treatment temperature on the content of coating... of heat treatment temperatures. The uniformity of porous structures can make the capacitance of the coating stable and the content of the coating capacitance reaches the highest after heat-treated......
the primary fatigue cracks at elevated temperatures initiate at V-notch. The crack in test sample before heat-treatment prefers to occur and the crack propagation rate is larger than that of the test sample after heat-treatment. The propagation cracking around Si particles and through Si particles are the principle mechanisms of interaction between Si particles and crack. The SiC particles play......
calculated with Scheil-Gulliver model in the Thermo-calc software. And the amounts of several phases formed during solidification were also calculated. Synchronously, the heat-treatment temperatures...-treatment temperature In Al-Mg-Er alloys, the amount of Al3Er is very important to the properties of these alloys. So how to gain the highest amount of Al3Er from heat treatment will be a main......
hydroxychlorides was investigated using thermogravimetric analysis. The rare earth oxychloride nanospin- dles were synthesized via a simple heat-treatment of rare earth hydroxychloride nanospindles.关键词:......
as-extruded alloys by solution heat-treatment and artificial aging (T6) were comparable to commercial wrought magnesium alloys.关键词:......
% boron and 0wt%–7.9wt% titanium. The effects of titanium content and hot-rolling and heat-treatment processes on the microstructure and properties of the laminated plates were studied. The results indicated that the optimum titanium content was 5.7wt% when the boron content was 2.25wt%, and that the best overall properties were obtained after heat treatment at 1100°C for 4 h. The tensile strength......
of the cold-rolling procedure and the recrystallizing heat-treatment process,whereas the content of low-angle grain boundaries(from 2° to 10° misorientation) in the substrate reached 95.1%.关键词:......
