Effect of Carburizing Service Environments on the Mechanical Properties of High-Temperature Alloys

1984 ◽  
Vol 66 (2) ◽  
pp. 363-368 ◽  
Author(s):  
Philip J. Ennis ◽  
Klaus P. Mohr ◽  
Hans Schuster
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Temperature Alloys ◽  
Service Environments

Powder Metallurgy Repair of Turbine Components

1994 ◽  
Vol 116 (1) ◽  
pp. 237-242 ◽  
Author(s):  
K. A. Ellison ◽  
P. Lowden ◽  
J. Liburdi
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Filler Metal ◽  
Repair Process ◽  
Parent Material ◽  
High Temperature Alloys ◽  
Wide Gap ◽  
Mechanical Cleaning ◽  
Repair Techniques

An advanced powder metallurgy repair process called Liburdi Powder Metallurgy (LPM) has been developed for the repair, overlay or joining of nickel and cobalt-based high-temperature alloys. This process involves mechanical cleaning, followed by the application and consolidation of a filler metal powder, which has substantially the same composition as the base metal, and produces joints with mechanical properties similar to those of the parent material. While previously activated braze or “wide-gap” repair processes have been limited to clearances of approximately 1 mm, the LPM technique has the ability to bridge larger gaps of over 5 mm. In addition, the LPM joints contain significantly lower concentrations of melting point depressants such as silicon and boron than conventional wide-gap repair techniques and exhibit superior microstructural features. The characteristics and typical applications of the LPM process for blade and vane repairs are highlighted and the results of laboratory and engine tests are discussed.

Mechanical properties of high-temperature alloys of AlRu

1991 ◽  
Vol 22 (2) ◽  
pp. 403-414 ◽  
Author(s):  
R. L. Fleischer ◽  
R. D. Field ◽  
C. L. Briant
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Temperature Alloys

scholarly journals Powder Metallurgy Repair of Turbine Components

1992 ◽  
Author(s):  
K. A. Ellison ◽  
P. Lowden ◽  
J. Liburdi
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Filler Metal ◽  
Repair Process ◽  
Parent Material ◽  
High Temperature Alloys ◽  
Wide Gap ◽  
Mechanical Cleaning ◽  
Repair Techniques

An advanced powder metallurgy repair process called Liburdi Powder Metallurgy (LPM)1 has been developed for the repair, overlay or joining nickel and cobalt-based high temperature alloys. This process involves mechanical cleaning, followed by the application and consolidation of a filler metal powder which has substantially the same composition as the base metal, and produces joints with mechanical properties similar to those of the parent material. While previous activated braze or “wide-gap” repair processes have been limited to clearances of approximately 1 mm, the LPM technique has the ability to bridge larger gaps of over 5 mm. In addition, the LPM joints contain significantly lower concentrations of melting point depressants such as silicon and boron than conventional wide-gap repair techniques and exhibit superior microstructural features. The characteristics and typical applications of the LPM process for blade and vane repairs are highlighted and the results of laboratory and engine tests are discussed.

scholarly journals Evaluation of short-term mechanical properties of a joint of difficult-to-weld nickel high-temperature alloys of ZhS6 type

2019 ◽  
Vol 2019 (7) ◽  
pp. 29-35
Author(s):  
K.A. Yushchenko ◽  
◽  
A.V. Yarovitsyn ◽  
N.O. Chervyakov ◽  
A.V. Zvyagintseva ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Short Term ◽  
High Temperature Alloys

The effects of boron addition on the microstructure and mechanical properties of Co–Re-based high-temperature alloys

2012 ◽  
Vol 66 (1) ◽  
pp. 60-63 ◽  
Author(s):  
D. Mukherji ◽  
J. Rösler ◽  
M. Krüger ◽  
M. Heilmaier ◽  
M.-C. Bölitz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Boron Addition ◽  
Microstructure And Mechanical Properties ◽  
High Temperature Alloys

Features of the Formation of Structure and Phases in Single-Crystal High-Temperature Alloys and their Effect on Mechanical Properties

2019 ◽  
Vol 946 ◽  
pp. 145-149
Author(s):  
Nikolay A. Popov ◽  
Kseniya I. Lugovaya ◽  
Arkadiy Yu. Zhilyakov
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Temperature ◽  
Single Crystal ◽  
Nickel Alloys ◽  
Strength Properties ◽  
Phase Changes ◽  
High Temperature Alloys ◽  
Structure And Phase Transformations ◽  
The Stability

Features of the structure and phase transformations in single-crystal nickel alloys 1, 2 after long high-temperature exposures were considered in this paper. The results and studies of the residual mechanical properties of alloys after exposure are given. Nanophase hardening of single-crystal heat resistant nickel alloys was also considered. The method of heat treatment of single-crystal high-temperature nickel alloys was developed based on the studies. It provides an increase in the strength properties of alloys by 20...30%, due to the formation of bulk nanophases (γn+ γ'n). The data obtained on structural and phase changes in high-temperature nickel alloys make it possible to evaluate the stability of the structural state of alloys.

scholarly journals Evaluation of short-term mechanical properties of a joint of difficult-to-weld nickel high-temperature alloys of ZhS6 type

2019 ◽  
Vol 2019 (7) ◽  
pp. 38-45 ◽  
Author(s):  
K.A. Yushchenko ◽  
◽  
A.V. Yarovitsyn ◽  
N.O. Chervyakov ◽  
A.V. Zvyagintseva ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Short Term ◽  
High Temperature Alloys

A NICKEL–ALUMINUM–MOLYBDENUM CREEP RESISTANT ALLOY

1949 ◽  
Vol 27f (2) ◽  
pp. 80-98
Author(s):  
H. V. Kinsey ◽  
M. T. Stewart
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Room Temperature ◽  
Creep Rupture ◽  
Nickel Aluminum ◽  
Resistant Alloy ◽  
Molybdenum Alloys ◽  
High Temperature Alloys ◽  
Preliminary Study

This paper describes a preliminary study of alloys of nickel and aluminum modified with molybdenum. The purpose of this work is to develop an alloy for use under conditions of stress at temperatures of 815 °C. (1500° F.) and over. The room temperature mechanical properties of alloys of nickel and aluminum, and the influence of molybdenum on these properties, have been investigated. Certain combinations of nickel, aluminum, and molybdenum have been shown to possess tensile strengths well over 100,000 lb. per sq. in. at room temperature, and it has been demonstrated that certain characteristic microstructures, dependent upon the ratio of nickel to aluminum, are essential for the realization of these high strengths. Creep-rupture tests at 815 °C. (1500° F.) have been carried out on typical nickel–aluminum–molybdenum alloys. The results have shown that certain of these alloys are superior in many respects to existing high temperature alloys, when tested under creep-rupture conditions at 815 °C. (1500° F.). The same characteristics of microstructure that are essential for high room temperature strengths were also found to be necessary to obtain good creep-rupture characteristics at 815 °C. (1500° F.).

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