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07425 Development of an Atlas of Microstructures for the Latest Heat-Resistant Cast Alloys

Picture for 07425 Development of an Atlas of Microstructures for the Latest Heat-Resistant Cast Alloys
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Product Number: 51300-07425-SG
ISBN: 07425 2007 CP
Author: Michael Schutze, Ellen Berghof-Hasselbacher, and John J. Hoffman
Publication Date: 2007
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A comprehensive atlas of microstructures has been compiled detailing the microstructural changes as a function of exposure temperature and aging time for the HP-modified, HP-microalloyed, and 35Cr/45Ni alloy families. The microstructural characterization included optical microscopy with differential interference contrast and interference layer techniques, scanning electron microscopy, and electron probe microanalysis. The compositions of the precipitates were analyzed and the corresponding carbide and intermetallic phases identified. The concentrations of the various phases were quantified via image analysis allowing the development of diagrams characterizing the kinetics of phase transformation as a function of temperature. This level of aged microstructural information has heretofore not been available for heat resistant cast alloys.
A comprehensive atlas of microstructures has been compiled detailing the microstructural changes as a function of exposure temperature and aging time for the HP-modified, HP-microalloyed, and 35Cr/45Ni alloy families. The microstructural characterization included optical microscopy with differential interference contrast and interference layer techniques, scanning electron microscopy, and electron probe microanalysis. The compositions of the precipitates were analyzed and the corresponding carbide and intermetallic phases identified. The concentrations of the various phases were quantified via image analysis allowing the development of diagrams characterizing the kinetics of phase transformation as a function of temperature. This level of aged microstructural information has heretofore not been available for heat resistant cast alloys.
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Picture for 07424 Precipitation and Its Effect on the Design of Cast Heat Resistant Alloys
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07424 Precipitation and Its Effect on the Design of Cast Heat Resistant Alloys

Product Number: 51300-07424-SG
ISBN: 07424 2007 CP
Author: D-Voke, R-Pankiw, N-Evans, K-Liu, M-Santella, V-Sikka, G-Muralidharan, P-Maziasz, & C-Stevens
Publication Date: 2007
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Picture for 07421 Fabricating Nickel Alloy Products to Avoid Stress Relaxation Cracking
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07421 Fabricating Nickel Alloy Products to Avoid Stress Relaxation Cracking

Product Number: 51300-07421-SG
ISBN: 07421 2007 CP
Author: Lewis E. Shoemaker, Gaylord D. Smith, Brian A. Baker, and Jon Poole
Publication Date: 2007
$20.00

Various alloys subjected various heat treatments were examined in-service and tested to determine their susceptibility to stress relaxation cracking.
Picture for 07423 Control of Relaxation Cracking in Austenitic High Temperature Components
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07423 Control of Relaxation Cracking in Austenitic High Temperature Components

Product Number: 51300-07423-SG
ISBN: 07423 2007 CP
Author: Hans Van Wortel
Publication Date: 2007
$20.00

The research was focused to assess the key factors concerning relaxation cracking and how to control it. It included the effect of chemical composition of the base materials (both Fe and Ni base alloys), heat to heat variation, grain size, cold deformation, welding, operating temperature and heat treatments.
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