Creep behaviour of the creep resistant MgY3Nd2Zn1Mn1 alloy

F. Hnilica; V. Janík; B. Smola; I. Stulíková; V. Očenášek

doi:10.1016/j.msea.2007.12.009

Creep behaviour of the creep resistant MgY3Nd2Zn1Mn1 alloy

F. Hnilica, V. Janík, B. Smola, I. Stulíková, V. Očenášek

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Creep, microstructure and failure of the squeeze cast MgY3Nd2Zn1Mn1 alloy were investigated. The tensile creep tests were performed at 300 °C and constant load in the stress range 30-80 MPa. The minimum creep rate over(ε{lunate}, ̇)_min, as a function of the stress, follows a power law with the exponent n = 5.9 at 30-70 MPa. The time to fracture t_f is also a power function of the stress with an exponent m = -4.4. The modified Monkman-Grant relation is valid. Microstructure development during creep exposure of the MgY3Nd2Zn1Mn1 alloy suggests the low stacking fault energy as the main creep controlling factor. The alloy is superior to the WE43 alloy both in time to fracture and in the minimum creep rate about one and two orders of magnitude, respectively. Both the mean value of the modified Monkman-Grant constant and its scatter correspond to the model of constrained growth of cavities along dendrite boundaries.

Original language	English
Pages (from-to)	93-98
Number of pages	6
Journal	Materials Science and Engineering A
Volume	489
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2007.12.009
Publication status	Published - 20 Aug 2008
Externally published	Yes

Keywords

Creep properties
Mg-Y-Nd-Zn alloys
Microstructure
Monkman-Grant relationship
Precipitation

ASJC Scopus subject areas

Materials Science(all)

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10.1016/j.msea.2007.12.009

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title = "Creep behaviour of the creep resistant MgY3Nd2Zn1Mn1 alloy",

abstract = "Creep, microstructure and failure of the squeeze cast MgY3Nd2Zn1Mn1 alloy were investigated. The tensile creep tests were performed at 300 °C and constant load in the stress range 30-80 MPa. The minimum creep rate over(ε{lunate},{\. })min, as a function of the stress, follows a power law with the exponent n = 5.9 at 30-70 MPa. The time to fracture tf is also a power function of the stress with an exponent m = -4.4. The modified Monkman-Grant relation is valid. Microstructure development during creep exposure of the MgY3Nd2Zn1Mn1 alloy suggests the low stacking fault energy as the main creep controlling factor. The alloy is superior to the WE43 alloy both in time to fracture and in the minimum creep rate about one and two orders of magnitude, respectively. Both the mean value of the modified Monkman-Grant constant and its scatter correspond to the model of constrained growth of cavities along dendrite boundaries.",

keywords = "Creep properties, Mg-Y-Nd-Zn alloys, Microstructure, Monkman-Grant relationship, Precipitation",

author = "F. Hnilica and V. Jan{\'i}k and B. Smola and I. Stul{\'i}kov{\'a} and V. O{\v c}en{\'a}{\v s}ek",

year = "2008",

month = aug,

day = "20",

doi = "10.1016/j.msea.2007.12.009",

language = "English",

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journal = "Materials Science and Engineering A",

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T1 - Creep behaviour of the creep resistant MgY3Nd2Zn1Mn1 alloy

AU - Hnilica, F.

AU - Janík, V.

AU - Smola, B.

AU - Stulíková, I.

AU - Očenášek, V.

PY - 2008/8/20

Y1 - 2008/8/20

N2 - Creep, microstructure and failure of the squeeze cast MgY3Nd2Zn1Mn1 alloy were investigated. The tensile creep tests were performed at 300 °C and constant load in the stress range 30-80 MPa. The minimum creep rate over(ε{lunate}, ̇)min, as a function of the stress, follows a power law with the exponent n = 5.9 at 30-70 MPa. The time to fracture tf is also a power function of the stress with an exponent m = -4.4. The modified Monkman-Grant relation is valid. Microstructure development during creep exposure of the MgY3Nd2Zn1Mn1 alloy suggests the low stacking fault energy as the main creep controlling factor. The alloy is superior to the WE43 alloy both in time to fracture and in the minimum creep rate about one and two orders of magnitude, respectively. Both the mean value of the modified Monkman-Grant constant and its scatter correspond to the model of constrained growth of cavities along dendrite boundaries.

AB - Creep, microstructure and failure of the squeeze cast MgY3Nd2Zn1Mn1 alloy were investigated. The tensile creep tests were performed at 300 °C and constant load in the stress range 30-80 MPa. The minimum creep rate over(ε{lunate}, ̇)min, as a function of the stress, follows a power law with the exponent n = 5.9 at 30-70 MPa. The time to fracture tf is also a power function of the stress with an exponent m = -4.4. The modified Monkman-Grant relation is valid. Microstructure development during creep exposure of the MgY3Nd2Zn1Mn1 alloy suggests the low stacking fault energy as the main creep controlling factor. The alloy is superior to the WE43 alloy both in time to fracture and in the minimum creep rate about one and two orders of magnitude, respectively. Both the mean value of the modified Monkman-Grant constant and its scatter correspond to the model of constrained growth of cavities along dendrite boundaries.

KW - Creep properties

KW - Mg-Y-Nd-Zn alloys

KW - Microstructure

KW - Monkman-Grant relationship

KW - Precipitation

U2 - 10.1016/j.msea.2007.12.009

DO - 10.1016/j.msea.2007.12.009

M3 - Article

AN - SCOPUS:44949096393

SN - 0921-5093

VL - 489

SP - 93

EP - 98

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 1-2

ER -

Creep behaviour of the creep resistant MgY3Nd2Zn1Mn1 alloy

Abstract

Keywords

ASJC Scopus subject areas

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