Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties

Pore annihilation was investigated in the single-crystal nickel-base superalloy CMSX-4. HIP tests at 1288 °C/103 MPa were interrupted at different times, then the specimens were investigated by TEM, metallography and density measurements. The kinetics of pore annihilation was determined. The pore c...

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Main Authors:	Epishin Alexander I., Link Thomas, Fedelich Bernard, Svetlov Igor L., Golubovskiy Evgeniy R.
Format:	Article
Language:	English
Published:	EDP Sciences 2014-01-01
Series:	MATEC Web of Conferences
Online Access:	http://dx.doi.org/10.1051/matecconf/20141408003

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spelling	doaj-860cfd31f572429cb3d77a9afc60fbbf2021-02-02T07:40:35ZengEDP SciencesMATEC Web of Conferences2261-236X2014-01-01140800310.1051/matecconf/20141408003matecconf_eurosuperalloys14_08003Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical propertiesEpishin Alexander I.0Link Thomas1Fedelich Bernard2Svetlov Igor L.3Golubovskiy Evgeniy R.4Technical University of Berlin, Institute of Material Science and TechnologyTechnical University of Berlin, Institute of Material Science and TechnologyFederal Institute for Materials Research and Testing (BAM)All-Russian Institute of Aviation Materials (VIAM)Central Institute of Aviation Motors (CIAM) Pore annihilation was investigated in the single-crystal nickel-base superalloy CMSX-4. HIP tests at 1288 °C/103 MPa were interrupted at different times, then the specimens were investigated by TEM, metallography and density measurements. The kinetics of pore annihilation was determined. The pore closure mechanism was identified as plastic deformation on the octahedral slip systems. A model describing the kinetics of pore closure has been developed on the base of crystal plasticity and large strain theory. Mechanical tests with the superalloy CMSX-4 and the Ru-containing superalloy VGM4 showed, that HIP significantly increases the fatigue life at low temperatures but has no effect on creep strength. http://dx.doi.org/10.1051/matecconf/20141408003
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Epishin Alexander I. Link Thomas Fedelich Bernard Svetlov Igor L. Golubovskiy Evgeniy R.
spellingShingle	Epishin Alexander I. Link Thomas Fedelich Bernard Svetlov Igor L. Golubovskiy Evgeniy R. Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties MATEC Web of Conferences
author_facet	Epishin Alexander I. Link Thomas Fedelich Bernard Svetlov Igor L. Golubovskiy Evgeniy R.
author_sort	Epishin Alexander I.
title	Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties
title_short	Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties
title_full	Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties
title_fullStr	Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties
title_full_unstemmed	Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties
title_sort	hot isostatic pressing of single-crystal nickel-base superalloys: mechanism of pore closure and effect on mechanical properties
publisher	EDP Sciences
series	MATEC Web of Conferences
issn	2261-236X
publishDate	2014-01-01
description	Pore annihilation was investigated in the single-crystal nickel-base superalloy CMSX-4. HIP tests at 1288 °C/103 MPa were interrupted at different times, then the specimens were investigated by TEM, metallography and density measurements. The kinetics of pore annihilation was determined. The pore closure mechanism was identified as plastic deformation on the octahedral slip systems. A model describing the kinetics of pore closure has been developed on the base of crystal plasticity and large strain theory. Mechanical tests with the superalloy CMSX-4 and the Ru-containing superalloy VGM4 showed, that HIP significantly increases the fatigue life at low temperatures but has no effect on creep strength.
url	http://dx.doi.org/10.1051/matecconf/20141408003
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Hot isostatic pressing of single-crystal nickel-base superalloys: Mechanism of pore closure and effect on Mechanical properties

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