Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Jack Telesman"'
Publikováno v:
Metallurgical and Materials Transactions A. 49:3838-3853
Cyclic near-threshold fatigue crack growth (FCG) behavior of two disk superalloys was evaluated and was shown to exhibit an unexpected sudden failure mode transition from a mostly transgranular failure mode at higher stress intensity factor ranges to
Publikováno v:
International Journal of Fatigue. 150:106328
Machining parameters can influence fatigue life by altering residual stresses, cold work and surface roughness. A study was performed to examine the effect of various broaching machining parameters on high temperature fatigue lives of a nickel-based
Publikováno v:
Materials Science and Engineering: A. 708:336-350
An investigation of high temperature cyclic fatigue crack growth (FCG) threshold behavior of two advanced nickel disk alloys was conducted. The focus of the study was the unusual crossover effect in the near-threshold region of these type of alloys w
Autor:
Ivan E. Locci, Jack Telesman, J. A. Nesbitt, Robert A. Miller, Tim Gabb, D. Johnson, Richard B. Rogers, B. J. Puleo, Susan L. Draper
Publikováno v:
Journal of Materials Engineering and Performance. 26:5237-5250
Oxidation and corrosion can attack superalloy disk surfaces exposed to increasing operating temperatures in some turbine engine environments. Any potential protective coatings must also be resistant to harmful fatigue cracking during service. The obj
Autor:
Tim Gabb, Christopher Kantzos, Peter J. Bonacuse, Jack Telesman, Peter T. Kantzos, Robert L. Barrie
Publikováno v:
International Journal of Fatigue. 142:105953
Crack initiation, crack coalescence and small crack growth behavior were monitored for over 400 seeded inclusions during interrupted low cycle fatigue testing conducted on the P/M Udimet 720 nickel disk alloy at 650 °C. Two types of seeded alumina i
Publikováno v:
International Journal of Fatigue. 87:311-325
A study was performed to determine and model the effect of high temperature dwells on notched low cycle fatigue (NLCF) and notch stress rupture behavior of a fine grain LSHR powder metallurgy (PM) nickel-based superalloy. It was shown that a 90 secon
Publikováno v:
Materials at High Temperatures. 33:517-527
The fatigue resistance of the hot corrosion pitted ME3 disk superalloy was investigated. Low cycle fatigue specimens were subjected to hot corrosion exposures that produced pits on the gage sections. These specimens were tested at varied temperatures
Publikováno v:
International Journal of Fatigue. 133:105431
A novel, empirically-based damage tolerance life prediction methodology has been developed to model dwell fatigue crack growth (DFCG) behavior in Ni-based disk superalloys. The methodology is based on a new crack driving force parameter, termed Ksrf,
Publikováno v:
International Journal of Fatigue. 33:414-426
Mechanical property requirements vary with location in nickel-based superalloy disks. To maximize the associated mechanical properties, heat treatment methods have been developed for producing tailored microstructures. In this study, a specialized he
Publikováno v:
Journal of Materials Engineering and Performance. 19:77-89
The effects of hot corrosion pits on low-cycle fatigue life and failure modes of the disk superalloy ME3 were investigated. Low-cycle fatigue specimens were subjected to hot corrosion exposures producing pits, then tested at low and high temperatures