The Criterion of High-Temperature Creep of Metals Based on Relative Changes of Density

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The Criterion of High-Temperature Creep of Metals Based on Relative Changes of Density. / Arutyunyan, A.; Arutyunyan, R.; Saitova, R.

In: WSEAS Transactions on Applied and Theoretical Mechanics, Vol. 14, 14, 2019, p. 140-144.

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

BibTeX

@article{01247ad6fec544d0aafd34a660f722f5,

title = "The Criterion of High-Temperature Creep of Metals Based on Relative Changes of Density",

abstract = "Changes of the porosity and density of various metals and alloys due to the formation and development of micropores and microcracks in the process of high-temperature creep are studied in numerous experiments. Based on these studies the density is considered as integral measure of the structural micro-defects accumulation, and the damage parameter is defined as the ratio of current density to initial density. Taking into account this parameter and the mass conservation law interconnected kinetic equations for creep deformation and damage parameter are formulated. An analytical solution connecting the damage parameter to the value of deformation is obtained. In this case, the creep deformation is calculated approximately. The comparison of theoretical damage and creep curves with corresponding experimental data are given.",

keywords = "Creep deformation, Damage parameter, Density changes, High-temperature creep, Long-term strength curves, Loosening, Thermal brittleness",

author = "A. Arutyunyan and R. Arutyunyan and R. Saitova",

note = "Funding Information: Financial support of the Russian Foundation for Basic Research (Grants N 18-01-00146) is gratefully acknowledged.",

year = "2019",

language = "English",

volume = "14",

pages = "140--144",

journal = "WSEAS Transactions on Applied and Theoretical Mechanics",

issn = "1991-8747",

publisher = "WORLD SCIENTIFIC PUBL CO PTE LTD",

}

RIS

TY - JOUR

T1 - The Criterion of High-Temperature Creep of Metals Based on Relative Changes of Density

AU - Arutyunyan, A.

AU - Arutyunyan, R.

AU - Saitova, R.

N1 - Funding Information: Financial support of the Russian Foundation for Basic Research (Grants N 18-01-00146) is gratefully acknowledged.

PY - 2019

Y1 - 2019

N2 - Changes of the porosity and density of various metals and alloys due to the formation and development of micropores and microcracks in the process of high-temperature creep are studied in numerous experiments. Based on these studies the density is considered as integral measure of the structural micro-defects accumulation, and the damage parameter is defined as the ratio of current density to initial density. Taking into account this parameter and the mass conservation law interconnected kinetic equations for creep deformation and damage parameter are formulated. An analytical solution connecting the damage parameter to the value of deformation is obtained. In this case, the creep deformation is calculated approximately. The comparison of theoretical damage and creep curves with corresponding experimental data are given.

AB - Changes of the porosity and density of various metals and alloys due to the formation and development of micropores and microcracks in the process of high-temperature creep are studied in numerous experiments. Based on these studies the density is considered as integral measure of the structural micro-defects accumulation, and the damage parameter is defined as the ratio of current density to initial density. Taking into account this parameter and the mass conservation law interconnected kinetic equations for creep deformation and damage parameter are formulated. An analytical solution connecting the damage parameter to the value of deformation is obtained. In this case, the creep deformation is calculated approximately. The comparison of theoretical damage and creep curves with corresponding experimental data are given.

KW - Creep deformation

KW - Damage parameter

KW - Density changes

KW - High-temperature creep

KW - Long-term strength curves

KW - Loosening

KW - Thermal brittleness

UR - http://www.scopus.com/inward/record.url?scp=85067841045&partnerID=8YFLogxK

M3 - Article

VL - 14

SP - 140

EP - 144

JO - WSEAS Transactions on Applied and Theoretical Mechanics

JF - WSEAS Transactions on Applied and Theoretical Mechanics

SN - 1991-8747

M1 - 14

ER -

ID: 41551657