Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications

Ni based super alloy 617 is widely used in transition liners in both aircraft and land-based gas turbines, power plant applications because of its high temperature strength, oxidation resistance and creep properties. Ni based alloys are highly susceptible to hot cracking like solidification and liquation racking issues. In this present work, the susceptibility of alloy 617 to solidification cracking is studied based on the varestraint test. Results of this weldability test proved that in addition to the solidification cracking susceptibility alloy 617 is prone to liquation cracking also. Keywords: Varestraint test, Alloy 617, Solidification cracking, Liquidation cracking.

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Structure and Texture of Oxide Dispersion Strengthened Alloy 617 for Very High Temperature Applications

Metallurgical and Materials Transactions A ◽

10.1007/s11661-021-06442-y ◽

2021 ◽

Author(s):

M. Sivakumar ◽

Shyam Kanta Sinha ◽

Arup Dasgupta ◽

Sufyan M. Shaikh

Keyword(s):

High Temperature ◽

Oxide Dispersion Strengthened ◽

Oxide Dispersion ◽

Oxide Dispersion Strengthened Alloy ◽

Alloy 617 ◽

Very High ◽

Temperature Applications

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Development of Magnesium Based Alloys for High Temperature Applications

Materials Science Forum ◽

10.4028/www.scientific.net/msf.673.179 ◽

2011 ◽

Vol 673 ◽

pp. 179-184 ◽

Cited By ~ 2

Author(s):

Uma Thanu Subramonia Pillai ◽

Amirthalingam Srinivasan ◽

Krishnamorthy Raghukandan ◽

Ballembettu Chandrasekhar Pai

Keyword(s):

Mechanical Properties ◽

Corrosion Resistance ◽

High Temperature ◽

Corrosion Behavior ◽

Creep Resistance ◽

Alloying Elements ◽

Az91 Alloy ◽

Thermally Stable ◽

Creep Properties ◽

Temperature Applications

Individual and combined additions of elements like Si, Sb, Sr are carried out to AZ91 alloy and its microstructure, mechanical properties especially creep properties and corrosion behavior are investigated. In general, additions of the above elements improve the mechanical properties. Further, the results show these alloying elements introduce thermally stable intermetallics and thereby improve the creep performance. Among various additions, Sb addition provides highest creep resistance. With the Si and Sr additions, the corrosion resistance of AZ91 alloy is improved. Detailed micro-mechanisms are also studied and they are correlated with the properties studied.

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Creep Properties of Ti-48Al-2Cr-2Nb Produced by Selective Electron Beam Melting

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.704.190 ◽

2016 ◽

Vol 704 ◽

pp. 190-196 ◽

Cited By ~ 3

Author(s):

Vera Juechter ◽

Carolin Körner

Keyword(s):

Electron Beam ◽

High Temperature ◽

Electron Beam Melting ◽

Titanium Aluminides ◽

Turbine Blades ◽

Weight Ratio ◽

Cast Material ◽

Creep Properties ◽

Selective Electron Beam Melting ◽

Temperature Applications

Titanium aluminides are highly attractive for high temperature applications involving dynamic components, e.g. turbine blades or turbocharger wheels, due to their high strength-to-weight ratio. The drawback is the difficult manufacturing of this material class due to the low toughness and high sensitivity to oxygen. Selective electron beam melting SEBM shows a new approach of producing complex titanium aluminide parts without a major oxygen pick up and avoiding problems with brittleness. The high cooling rates of this process lead to a very fine microstructure, which is not fully understood up to now. The microstructure determines the creep properties and therefore defines the performance of this material in high temperature applications. In this contribution, the creep properties of Ti-48Al-2Cr-2Nb fabricated by SEBM are investigated. The influence of the processing parameters and the building direction on the microstructure and the creep properties are discussed and compared to cast material.

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Creep-Environment Interactions of Alloy 617 at Elevated Temperature

Volume 6: Materials and Fabrication, Parts A and B ◽

10.1115/pvp2008-61415 ◽

2008 ◽

Author(s):

Daejong Kim ◽

Changheui Jang ◽

Woo Seog Ryu

Keyword(s):

High Temperature ◽

Creep Strain ◽

Elevated Temperatures ◽

Extended Period ◽

Nickel Base Superalloy ◽

Environment Interaction ◽

Creep Tests ◽

Alloy 617 ◽

Creep Properties ◽

Deformation Properties

Creep behavior and degradation of creep properties of high-temperature materials often limit the lives of components and structures designed to operate for extended period under stress at elevated temperatures. A nickel-base superalloy, Alloy 617 in particular which is considered as a prospective material for hot gas duct and intermediate heat exchanger in very high temperature gas cooled reactor, was studied for creep properties. Creep tests were carried out under various sustained tensile loadings in air and helium environments at temperature of 800°C, 900°C, and 1000°C. Times for 1% creep strain and creep rupture were taken from the short-term creep tests within 1000 hours. Effect of creep-environment interaction on creep strain and changes in viscous deformation properties by dynamic recrystallization were discussed.

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Comparative study on the high-temperature tensile and creep properties of Alloy 617 base and weld metals

Journal of Mechanical Science and Technology ◽

10.1007/s12206-013-0616-7 ◽

2013 ◽

Vol 27 (8) ◽

pp. 2331-2340 ◽

Cited By ~ 22

Author(s):

Woo-Gon Kim ◽

Jae-Young Park ◽

I. M. W. Ekaputra ◽

Sung-Deok Hong ◽

Seon-Jin Kim ◽

...

Keyword(s):

High Temperature ◽

Comparative Study ◽

Alloy 617 ◽

Creep Properties ◽

Weld Metals ◽

High Temperature Tensile

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Low Cycle Fatigue Behaviors of Alloy 617 (INCONEL 617) Weldments for High Temperature Applications

Metals ◽

10.3390/met6050100 ◽

2016 ◽

Vol 6 (5) ◽

pp. 100 ◽

Cited By ~ 6

Author(s):

Rando Dewa ◽

Seon Kim ◽

Woo Kim ◽

Eung Kim

Keyword(s):

High Temperature ◽

Low Cycle Fatigue ◽

Cycle Fatigue ◽

Alloy 617 ◽

Inconel 617 ◽

Temperature Applications

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Microstructural characterization of a rapidly solidified Al-Fe-V-Si alloy for elevated temperature applications

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100104819 ◽

1988 ◽

Vol 46 ◽

pp. 550-551

Author(s):

R. E. Franck ◽

J. A. Hawk ◽

G. J. Shiflet

Keyword(s):

High Temperature ◽

Elevated Temperature ◽

Grain Growth ◽

Volume Fraction ◽

Microstructural Characterization ◽

Second Phase ◽

Microstructural Stability ◽

Elevated Temperature Strength ◽

Temperature Applications

Rapid solidification processing (RSP) is one method of producing high strength aluminum alloys for elevated temperature applications. Allied-Signal, Inc. has produced an Al-12.4 Fe-1.2 V-2.3 Si (composition in wt pct) alloy which possesses good microstructural stability up to 425°C. This alloy contains a high volume fraction (37 v/o) of fine nearly spherical, α-Al12(Fe, V)3Si dispersoids. The improved elevated temperature strength and stability of this alloy is due to the slower dispersoid coarsening rate of the silicide particles. Additionally, the high v/o of second phase particles should inhibit recrystallization and grain growth, and thus reduce any loss in strength due to long term, high temperature annealing.The focus of this research is to investigate microstructural changes induced by long term, high temperature static annealing heat-treatments. Annealing treatments for up to 1000 hours were carried out on this alloy at 500°C, 550°C and 600°C. Particle coarsening and/or recrystallization and grain growth would be accelerated in these temperature regimes.

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