EP 0318887 B1 19930811 - PROCESS FOR INCREASING THE FATIGUE STRENGTH AND DECREASING THE CRACKING SUSCEPTIBILITY AT A HIGH TEMPERATURE OF A WORK PIECE MADE FROM AN OXIDE DISPERSION-HARDENED NICKEL-BASE SUPER ALLOY
Title (en)
PROCESS FOR INCREASING THE FATIGUE STRENGTH AND DECREASING THE CRACKING SUSCEPTIBILITY AT A HIGH TEMPERATURE OF A WORK PIECE MADE FROM AN OXIDE DISPERSION-HARDENED NICKEL-BASE SUPER ALLOY
Publication
Application
Priority
CH 467487 A 19871201
Abstract (en)
[origin: EP0318887A1] The fatigue strength at high temperatures and during the temperature cycle of a workpiece (2) consisting of an oxide dispersion-hardened nickel-based superalloy is increased by improving the ductility of its surface zone (5) by cold-working the latter at room temperature to a depth of at least 100 mu m by at least an amount which corresponds to a plastic extension of 2%. The susceptibility to cracking at high temperatures is simultaneously reduced. <IMAGE>
IPC 1-7
IPC 8 full level
C22F 1/10 (2006.01)
CPC (source: EP)
C22F 1/10 (2013.01)
Citation (examination)
- Z. MATALLKDE., Band 77, Nr. 5, Mai 1986, Seiten 322-337; B. SCHOLTES et al.: "Auswirkungen mechanischer Randschichtverformungen auf das Festigkeitsverhalten metallischer Werkstoffe" * Zusammenfassung; Figur 1 *
- J.O. ALMEN et al.: "Residual stresses and fatigue in metals",1963, McGRAW-Hill Book Co., Inc., Seiten 46-58, New York, US; Kapitel 5 "Methods of producing residual stresses", Seiten 59-80: Kapitel 6 "Mechanical proceeding" * Seiten 64-65: "Shot peening"
Designated contracting state (EPC)
CH DE GB LI NL
DOCDB simple family (publication)
EP 0318887 A1 19890607; EP 0318887 B1 19930811; CH 676126 A5 19901214; DE 3883173 D1 19930916
DOCDB simple family (application)
EP 88119778 A 19881128; CH 467487 A 19871201; DE 3883173 T 19881128