高二生物学情分析:翻译求助，能翻多少是多少

Turbine reliability, particularly in circumstances involving combustion of contaminated fuels, is a major area of concern for the electric utilities. This project was proposed in response to that concern and resultant need as a means of improving turbine bucket life and reliability in a hot corrosion environment. The specific objectives of the project are two-fold:
To deliver for subsequent field test validation thirty-two utility size gas turbine buckets with the airfoils protected with superior corrosion-resistant overlay systems.
To provide an understanding of the effects of these corrosion-resistant overlay systems on the mechanical properties of the bucket alloy and to insure that these properties have not been degraded below acceptable levels by the presence of the overlays.
The project initially focused entirely upon the use of diffusion-bonded sheet cladding alloys as the protective overlay system. This workscope was modified in October 1981 to include the use and evaluation of vacuum plasma spray (VPS) coatings, as well as claddings, in recognition of the rapid and successful development of the VPS process as a means of applying overlay coatings.
The results of this project, as detailed in this report, indicate that both sheet cladding and VPS coating overlay systems can be successfully applied to utility-size first-stage buckets. However, the processing problems encountered with the sheet cladding approach for large airfoil surfaces suggest that scale-up to a manufacturing production process would be difficult and require additional process development before commercialization. More specifically, these problems involved both the fabrication of thin sheet of some of the program alloys and the attempts to modify the hot isostatic pressing (HIP) diffusion bonding cycle to simplify the overall cladding process. Fabrication of the corrosion-resistant CoCrAlY type alloys (S-57 and PFB-6) into the required 10 mil thick sheet proved to be very difficult at best, as a result of the relatively low ductility of these alloys and their resultant tendency to crack. Forming these alloys during the first steps of the cladding was also hampered by their lack of ductility. Efforts to simplify the cladding process by substituting a glassless braze-HIP cycle for the glass-HIP diffusion bonding cycle were not successful due to the inability to insure 100% leak-tight brazed seams. The braze alloy evaluated was also found to degrade fatigue properties under certain conditions of test. While buckets were successfully clad using the standard glass-HIP technique, that process does involve the additional task of post-HIP glass removal and the possibility of glass interaction with the bucket substrate alloy. The extent of the problems outlined above detract from the potential commercial applicability of the current developed cladding process for large size heavy duty gas turbine buckets as compared to commercial developments of the VPS process.