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Author: Anthony F. Giamei Publisher: ISBN: Category : Anisotropy Languages : en Pages : 67
Book Description
The modern single crystal superalloy baseline of Ni-5A1-2Ti-1Nb-9Cr-12W (by weight) was selected (PWA 1444). The Re/W ratio was varied from 0.0 to 1.0 as the Re + W was held constant at 12 wt %. Single crystals were grown with axial orientations of 001, 110, and 111 from four different alloys and were fully heat treated (gamma prime solution + age). An additional alloy was made at 4Ta/4W/4Re in the three high symmetry orientations. Test specimens of the compressive and tensile creep/rupture design were obtained by sectioning or electrochemical machining. Creep data were obtained in tension and compression with temperature/stress combinations of 816 C/650 Mpa, 899 C/380 MPa, 982 C/220 MPa and 1066 C/138 MPa (1500 F/94 ksi, 1650 F/55 ksi, 1800 F/32 ksi and 1950 F/20 ksi). Crystals were characterized by chemical analysis, optical metallography and crystallographic orientation determination by the Laue method. Aging studies were carried out at 816 C (1500 F), 899 C (1650 F), 982 C (1800 F) and 1066 C (1950 F). The Re content was found to systematically and substantially refine the gamma prime particle size. Transmission electron microscopy was carried out after 0.20% creep strain at 899 C (1650 F). The primary slip system was consistently (111) 110 for 001 and 110 oriented specimens but (100) 110 slip was found for the 111 oriented tensile and compressive samples at 0% Re. Higher Re levels showed a lesser tendency for cube slip. The Re addition substantially strengthens all three orientation tested, particularly 111.
Author: Anthony F. Giamei Publisher: ISBN: Category : Anisotropy Languages : en Pages : 67
Book Description
The modern single crystal superalloy baseline of Ni-5A1-2Ti-1Nb-9Cr-12W (by weight) was selected (PWA 1444). The Re/W ratio was varied from 0.0 to 1.0 as the Re + W was held constant at 12 wt %. Single crystals were grown with axial orientations of 001, 110, and 111 from four different alloys and were fully heat treated (gamma prime solution + age). An additional alloy was made at 4Ta/4W/4Re in the three high symmetry orientations. Test specimens of the compressive and tensile creep/rupture design were obtained by sectioning or electrochemical machining. Creep data were obtained in tension and compression with temperature/stress combinations of 816 C/650 Mpa, 899 C/380 MPa, 982 C/220 MPa and 1066 C/138 MPa (1500 F/94 ksi, 1650 F/55 ksi, 1800 F/32 ksi and 1950 F/20 ksi). Crystals were characterized by chemical analysis, optical metallography and crystallographic orientation determination by the Laue method. Aging studies were carried out at 816 C (1500 F), 899 C (1650 F), 982 C (1800 F) and 1066 C (1950 F). The Re content was found to systematically and substantially refine the gamma prime particle size. Transmission electron microscopy was carried out after 0.20% creep strain at 899 C (1650 F). The primary slip system was consistently (111) 110 for 001 and 110 oriented specimens but (100) 110 slip was found for the 111 oriented tensile and compressive samples at 0% Re. Higher Re levels showed a lesser tendency for cube slip. The Re addition substantially strengthens all three orientation tested, particularly 111.
Author: D. N. Duhl Publisher: ISBN: Category : Languages : en Pages : 17
Book Description
A study was conducted to determine the effects of crystallographic orientation and rhenium content on the creep behavior of a single crystal nickel-base superalloy. Creep tests conducted at 982 C and 220 MPa (32 ksi) on Alloy 444 single crystals show that there is an increase in creep strength as the specimen axis is varied from (001) to 26 C from (001). This orientation effect is favorable for use of nickel-base superalloy single crystal as turbine blade materials. Substitution of rhenium for tungsten in Alloy 444 increases creep strength. The mechanism for this effect is the subject of a continuing investigation.
Author: FernD.S. Marquis Publisher: Springer ISBN: 3319487647 Category : Technology & Engineering Languages : en Pages : 3431
Book Description
PRICM-8 features the most prominent and largest-scale interactions in advanced materials and processing in the Pacific Rim region. The conference is unique in its intrinsic nature and architecture which crosses many traditional discipline and cultural boundaries. This is a comprehensive collection of papers from the 15 symposia presented at this event.
Author: Holm Altenbach Publisher: Springer Science & Business Media ISBN: 3642351670 Category : Technology & Engineering Languages : en Pages : 365
Book Description
This volume presents the major outcome of the IUTAM symposium on “Advanced Materials Modeling for Structures”. It discusses advances in high temperature materials research, and also to provides a discussion the new horizon of this fundamental field of applied mechanics. The topics cover a large domain of research but place a particular emphasis on multiscale approaches at several length scales applied to non linear and heterogeneous materials. Discussions of new approaches are emphasised from various related disciplines, including metal physics, micromechanics, mathematical and computational mechanics.
Author: Si Hai Jiao Publisher: Trans Tech Publications Ltd ISBN: 3038135526 Category : Technology & Engineering Languages : en Pages : 2020
Book Description
This two-volume set contains a collection of 381 peer-reviewed papers. Its aim is to bring together the latest advances in, and applications of, alloy design, process development, component engineering, phase-composition prediction, high-temperature oxidation, wrought alloys, lifetime estimation and materials behavior, cobalt-based alloys, nickel-iron alloys, joining, alternative materials and powder-metallurgy and also to consider the future of superalloys.
Author: Jacek J. Skrzypek Publisher: Springer Science & Business Media ISBN: 3540364188 Category : Technology & Engineering Languages : en Pages : 370
Book Description
The scope of this book is based on the keynote lectures delivered during the Inter national Symposium on Anisotropic Behaviour of Damaged Materials ABDM, held in Krakow-Przegorzaiy, Poland, September 9-11, 2002. The Symposium was organized by the Solid Mechanics Division of the Institute of Mechanics and Machine Design - Cracow University of Technology, under aus pices of the Dean of the Faculty of Mechanical Engineering, Cracow University of Technology, Prof. S. Michalowski. The Co-organizers of the ABDM Symposium were: • Martin-Luther-Universitat Halle-Wittenberg, • Centre of Excellence for Advanced Materials and Structures AMAS at the In stitute of Fundamental Technological Research of the Polish Academy of Sci ences, Warsaw, • Committee of Mechanics of the Polish Academy of Sciences, Warsaw. Ten chapters of this book in their present form essentially exceed lectures de livered at the Symposium. They should rather be read as not only author's recent achievements in the field, but also the state of art and synthesis done by the lead ers in the mechanics community. The mixed formula of the Symposium, namely: the invited lectures and presentations of the original papers by the participants was used. 23 original papers, published in the Symposium Proceedings on CD, exhaust the full scope of the ABDM Symposium. The present book provides a survey of various damage models focusing on the damage response in anisotropic materials as well as damage-induced anisotropy.
Author: Anthony F. Giamei
Author: Anthony F. Giamei
Author: D. N. Duhl
Author: Walter W. Milligan
Author: 
Author: Walter W. Milligan
Author: FernD.S. Marquis
Author: Holm Altenbach
Author: 
Author: Si Hai Jiao
Author: Jacek J. Skrzypek