New PDF release: Advances in Materials Technology for Fossil Power Plants:

By D. Gandy, J. Shingledecker

Advances in fabrics expertise for Fossil strength vegetation: lawsuits from the 7th overseas convention, October 22-25, 2013, Waikoloa, Hawaii, united states.

One hundred eighty-five members representing 18 nations traveled from world wide to take part within the EPRI seventh overseas convention on Advances in fabrics expertise for Fossil strength crops at the massive Island of Hawaii, united states. This convention outfitted at the luck of the former 6 meetings initially begun via Prof. R. (Vis) Viswanathan, EPRI (FASM) in 1995 in London, England and held each 3 years when you consider that that point in San Sebastian (Spain), Swansea (Wales), Hilton Head Island (USA), Marco Island (USA), and Santa Fe (USA). This complaints comprises the biggest variety of papers ever amassed for this convention. Overwhelming reaction to the 2013 convention (over a 20% raise in variety of papers and technical talks) brought on the organizers to carry the 1st ever poster consultation. EPRI and ASM have back partnered to post this complaints that is geared up into nine topical parts: know-how overviews, nickel-based alloys for complex ultrasupercritical strength crops, fabrics for generators, alloys T23/24, Grades 91/92, oxidation and corrosion, welding and weld functionality, new alloys options, and creep and basic issues.

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The purpose of LTES and TOS1X is to target a weight of around 10 tons which will be welded to steel parts to make a 30 to 40-ton rotor. 34 Materials Temperature Level Weight Development Target FENIX-700 700℃ >10ton Ni-base material heavier than 10 tons without segregation LTES700R >700℃ 30~40ton >720℃ ↑ Ni:10ton + Steel:20~30ton Welding 10 ton Ni-base material with good weldability to steel TOS1X 10 ton Ni-base material with good weldability to steel Figure 22 Steam turbine rotor materials FENIX-700 which has superior long-term stability at 700deg-C was developed from Alloy706 by reducing Nb content and increasing Ti and Al content2).

Figure 6 Welded Rotor (Courtesy of MHI) By introducing the gas turbine cooling technology, we can reduce the use of Ni or Ni-Fe-based materials. Figure 7 shows a plan of an intermediate pressure turbine (IPT) that is cooled. Ni-based alloy is used only for the blades and some stationary parts around the steam inlet. Inlet Pipe, Nozzle Casing Ni-Based-Alloy Outer Casing CrMoV Inner Casing 12% Cr Rotor 12% Cr Blades Ni-Based-Alloy Figure 7 Cooled Turbine (Courtesy of Toshiba) A typical example of material selection for A-USC is shown in Figure 8.

NDTs will be performed frequently during operation for all test welds. After the end of operation final repair welds will be executed on all dismantled pipes of Test Loop 2. The creep behaviour of alloy 617B is monitored by running tests under respective load and temperature, as well as by using a thin wall piece designed for ~30000 h (measuring and monitoring of the creep online). 3 TEST LOOP 3: A617 OCC / A263 / HR6W / A625 cast base material and dissimilar welded joints The optimized chemical composition of A617B, called A617OCC is applied to explore possible improvements in weldability, which is due to less formation of chromium carbides.

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