A new experimental technique (repeated load annealing of flat wedge shaped specimens) was proposed for characterization of microstructural degradation under creep conditions. This technique was applied to investigate the microstructural degradation of the nickel-base superalloy CMSX-4 in a wide range of temperatures and stress levels. The results obtained allowed to describe analytically the kinetics of rafting, which is important to predict the reduction of fatigue lifetime and yield stress.

Specimens of single crystal superalloy SC16 were creep deformed at 1223K along [001] up to ±0.5% creep strain using stresses of −150MPa and +150MPa, respectively. Line widths and peak positions of superlattice reflections were measured by means of X-ray diffraction parallel and perpendicular to the load axis in the temperature range between 293K and 1173K. The line widths were found to decrease with the increase of temperature for both directions on the two specimens after tensile and compressive creep deformation. After both kinds of creep deformation the crystal lattice showed tetragonal distortion which decreased with increasing temperature. The tetragonality after tensile creep deformation was larger than unity while it was smaller than unity after compressive creep deformation. The peak positions and widths restored after cooling back to room temperature. The experimental results can qualitatively be explained by the creation of dislocations during deformation and their anisotropic arrangement at the γ/γ′ interfaces.

Materials and CorrosionVolume 56, Issue 1 p. 55-56 Corrosion Books Corrosion Books: DIN-Taschenbuch 19 Materialprüfnormen für metallische Werkstoffe. H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author First published: 13 January 2005 https://doi.org/10.1002/maco.200590007AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume56, Issue1January 2005Pages 55-56 RelatedInformation

Materials and CorrosionVolume 55, Issue 12 p. 949-949 Corrosion Books Corrosion Books: Mechanisches Verhalten der Werkstoffe. By: J. Rösler, H. Harders, M. Bäker H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author First published: 09 December 2004 https://doi.org/10.1002/maco.200490112AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume55, Issue12December 2004Pages 949-949 RelatedInformation

The gamma/gamma' lattice mismatch in specimens of single crystal superalloy SC16 creep deformed at 1223 K and 150 MPa to a creep strain of 0.5 % was measured by means of X-ray diffraction using synchrotron radiation. The measurements have been performed between room temperature and 1173 K in the both directions parallel and perpendicular to the [001] load axis. At room temperature the gamma/gamma' lattice mismatch measured on the (002) reflection has a positive sign and is larger compared to the mismatch in the non-deformed specimen, while the mismatch measured on the (200) reflection is slightly negative and its value is smaller than that of the non-deformed specimen. In both directions the gamma/gamma' lattice mismatch decreases with increasing temperature.

Materials and CorrosionVolume 54, Issue 10 p. 812-813 Corrosion Books Corrosion Books: Composite materials: Science and applications - Functional materials for modern technologies. By: Deborah D. L. Chung - Materials and Corrosion 10/2003 H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author First published: 10 October 2003 https://doi.org/10.1002/maco.200390168AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume54, Issue10October 2003Pages 812-813 RelatedInformation

The orientation and direction dependence of the critical resolved shear stress was determined experimentally for the chromium-rich superalloy SC 16 at 650, 750 and 850 degrees C and a constant strain rate of 10(-3) s(-1). The results are used to establish an extended Schmid law for octahedral slip in the temperature and orientation range in which cross-slip pinning of dislocation pairs in the gamma' phase takes place. Normal Schmid behaviour was assumed for orientations near [111], for which cube slip was activated on a macroscopic level. Differences between some commercial superalloys are worked out and can be attributed to morphology and volume fraction of the gamma' phase. The orientation dependence and asymmetry effects increase in the order NIMONIC 105, SC 16, Rene N4. The orientation range where macroscopic cube slip can be expected increases in the same order. A close inspection of the parameters which are responsible for non-Schmid behaviour suggests that, in addition to cross-slip pinning, a matrix effect must be operating as well, partly counteracting the behaviour expected for mono-phase gamma' crystals. (C) 2000 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

Materials and CorrosionVolume 48, Issue 5 p. 332-332 Corrosion Book Life prediction methodology for titanium matrix composites. Hrsg. von W. S. Johnson, J. M. Larsen, B. N. Cox, 632 Seiten, American Society for Testing and Materials, ASTM, Philadelphia 1996, £ 145.00, ISBN 0-8031-2039-7 H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author First published: 01 October 2004 https://doi.org/10.1002/maco.19970480510AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume48, Issue5May 1997Pages 332-332 RelatedInformation

Materials and CorrosionVolume 48, Issue 10 p. 713-713 Corrosion Book Particle strengthening of metals and alloys, von E. Nembach, 285 Seiten, John Wiley & Sons, Inc, New York, Chichester, Brisbane, Toronto, Singapore, Weinheim 1997, £ 70.00, ISBN 0-471-12072-3 H. Klingelhöffer, Search for more papers by this author H. Klingelhöffer, Search for more papers by this author First published: 01 October 2004 https://doi.org/10.1002/maco.19970481016Citations: 1AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume48, Issue10October 1997Pages 713-713 RelatedInformation

The LCF-behaviour of two single crystal superalloys developed as blade materials for the use in aircraft engines, viz. SRR99 and CMSX-6, was investigated at 980 degrees C. Special attention was given to the influence of hold periods at either the maximum (tension phase) or the minimum (compression phase) strain level. The introduction of a hold period in the compression phase led for both alloys to a pronounced reduction of the cycle number for crack initiation. This reduction was accentuated by reducing Delta epsilon(t). On the other hand, the influence of a hold period in the tension phase on N-A was much less pronounced. The evolution of the gamma/gamma'-microstructure and the fracture mechanisms characteristic for the different loading conditions were investigated using mainly SEM.

Materials and CorrosionVolume 47, Issue 9 p. 520-521 Corrosion Book Werkstoffmechanik. Von H. Alternbach., 184 S.,56 Abb., 14 Tab., Deutscher Verlag für Grundstoffindustrie, Stuttgart 1993, DM 58,00, ISBN 3–342–00490–8 H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author H. Klingelhöffer, H. KlingelhöfferSearch for more papers by this author First published: September 1996 https://doi.org/10.1002/maco.19960470908Citations: 1AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume47, Issue9September 1996Pages 520-521 RelatedInformation

Es wurde der Einfluß der Bestrahlung von Papier mit Röntgenstrahlung (150 kV) auf die Festigkeit des Fasergefüges geprüft und versucht, zwischen dieser und chemischen Eigenschaften des bestrahlten Papiers einen Zusammenhang herzustellen.

Durch Anwendung eines Remissionsverfahrens konnte die Adsorption von Ammoniak an verschiedenen Cellulosearten im nahen Infrarot verfolgt werden. Der bei der Adsorption erreichte Bedeckungsgrad lä\t sich durch die quantitative Auswertung der Spektren mittels derKubelka-Munk-Funktion abschätzen. Den erhaltenen Spektren kann entnommen werden, da\ die Adsorption hauptsächlich an den freien Hydroxylgruppen des CellulosemolekÜls erfolgt. Als Bindungstyp kommen WasserstoffbrÜcken der Art (OH ... N) in Frage.