Download or read book The Evaluation of Cobalt Based Alloys with Improved Hot Salt Corrosion Resistance written by R.A. Cottis and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Corrosion Abstracts written by and published by . This book was released on 1987 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hot Corrosion and Oxidation Studies on Cobalt Based Alloys written by Vincent F Hock (Jr) and published by . This book was released on 1977 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rates of oxidation and hot corrosion of pure cobalt, cobalt-chromium, cobalt-silicon and cobalt-chromium-silicon alloys were determined at 1000 C in oxygen at a pressure of 0.1 atmosphere. The hot corrosion studies were conducted under conditions of a continous supply of Na2S04 to the sample surface. In addition, the effect of thermal cycling on the hot corrosion resistance of the Co-15 Cr-Si alloy group was also investigated. For the cobalt-chromium alloys, it was found that a considerable decrease in the oxidation and hot corrosion rates occurred at chromium concentrations about 15 wt. %. The cobalt-silicon binary alloys showed a dramatic increase in the rate of oxidation up to 0.05 wt. % silicon according to normal doping theory. At silicon concentrations greater than 5 wt. %, a marked decrease in oxidation and hot corrosion was observed. Generally, the series of cobalt-chromium-silicon alloys exhibited much better oxidation and hot corrosion resistance than the binary alloys. The lowest rates were obtained for alloys with high silicon contents. One alloy in particular, Co-10 Cr-10 Si, exhibited the lowest total weight gain per unit area for both oxidation and hot corrosion. The hot corrosion resistances of the Co-15 Cr-Si alloys were decreased by thermal cycling. (Author).
Download or read book Hot Corrosion of Cobalt Base Alloys written by J. A. Goebel and published by . This book was released on 1975 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sodium sulfate-induced hot corrosion of cobalt and a number of binary, ternary and quaternary cobalt-based alloys containing aluminum, chromium, tungsten, molybdenum, tantalum, titanium and yttrium has been studied at 1000-degrees Celcius in 1 atm of oxygen or air. The studies consisted of both laboratory experiments and testing with a dynamic burner rig. The results obtained from these studies were compared to those available for equivalent nickel-base systems. Those obtained from laboratory tests were in satisfactory agreement with those from dynamic burner rigs except that the loss of chromium from the alloys was more pronounced in the high velocity rig tests. It was determined that sodium sulfate deposits caused increased oxidation of all of the alloys studied. Mechanisms for the hot corrosion of these alloys have been developed. A substantial difference between the hot corrosion resistance of cobalt- and nickel-base alloys has been observed only for alloys containing chromium and aluminum with no refractory elements. Chromium and yttrium produced beneficial effects on the hot corrosion of alloys; aluminum also produced beneficial effects except at low concentrations of aluminum. Molybdenum and tungsten usually produced deleterious effects on the hot corrosion of alloys whereas tantalum and titanium were apparently innocuous. (Author).
Download or read book High Temperature Alloys for Gas Turbines written by D. Coutsouradis and published by . This book was released on 1978 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion Resistance of Sodium Sulfate Coated Cobalt chromium aluminum Alloys at 900 C 1000 C and 1100 C written by and published by . This book was released on 1979 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on 1985 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper written by and published by . This book was released on 1985 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hot Corrosion and Oxidation Studies of Cobalt Based Superalloys at 1000 C written by Gregory A. Dries and published by . This book was released on 1979 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, the trend in superalloy design has been aimed toward the development of alloys which are resistant to the harmful effects of sodium sulfate formed within gas turbines operated in marine environments. This phenomenon, commonly referred to as hot corrosion, has been extensively studied. These studies have elucidated the mechanism of sodium sulfate attack and have led to the development of alloys resistant to hot corrosion. One approach to the development of alloys resistant to hot corrosion involves the formation of a protective oxide layer based on SiO2. The feasibility of this approach has been verified. The data reported in this study agree well with those of other investigators and show a significant increase in the resistance of alloys to hot corrosive attack with increased silicon content of the alloys. Two rather limiting observations were made from this study. First, the scales forming on the high silicon containing alloys were very susceptible to spalling as a result of temperature changes. A means should be developed to increase the adherence of these scales onto the metal substrate. Secondly, the high silicon containing alloys were very brittle and probably could not withstand the mechanical stresses occurring within operating turbines. It would be more feasible for these alloys to be utilized as a surface coating on an alloy whose mechanical properties are more in accord with turbine material requirements. (Author).
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1987 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Are Cobalt base Alloys Intrinsically More Resistant to Hot Corrosion Than Alloys Based on Nickel written by W. L. WHEATFALL and published by . This book was released on 1973 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Oxidation and Hot Corrosion Resistance of Cobalt base Superalloys written by Adrian M. Beltran and published by . This book was released on with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Study on Hot Corrosion of Cobalt Alloys written by J. A. GOEBEL and published by . This book was released on 1972 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naval Engineers Journal written by and published by . This book was released on 1981 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
