Interpolation Analysis of the Features of Long-Term Creep Rupture in Chrome-Nickel and Chrome-Molybdenum Steels

Krivenyuk, V. V.; Avramenko, D. S.; Prikhod’ko, R. P.

doi:10.1007/s11223-013-9446-1

Cited by 2 publications

(5 citation statements)

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“…The method is based on the concept of the base diagram, which is described by the relationship [5] log(~( , )) .…”

Section: Major Hypotheses Of the Modified Base Diagram Methods (Mbdm)mentioning

confidence: 99%

“…The Krivenyuk base diagram method offers much greater potentials as regards the length of prediction [5]. The calculations of creep rupture characteristics of the materials are based on statistical analysis of experimental curves and proposed base diagrams followed by estimation of a standard prediction error.…”

Section: Introductionmentioning

confidence: 99%

“…The new procedure of creep rupture prediction employing base diagrams [5] was proposed in [11]. But stress levels for chosen durability are refined with the residual function.…”

Section: Introductionmentioning

confidence: 99%

“…But stress levels for chosen durability are refined with the residual function. If in the base diagram method a set of constants are sought [5], in the modified method, the residual function parameters are found.…”

Section: Introductionmentioning

confidence: 99%

“…Analysis of the condition of constructions and feasibility of their further service is based on creep rupture diagrams of the materials. The latter are plotted by the test results of the specimens in uniaxial and multiaxial stress states under the action of constant stresses and temperatures [1][2][3][4][5]. Creep rupture tests can last from several days to tens of years.…”

mentioning

confidence: 99%

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Reliability of Time-Temperature Extrapolation of Creep Rupture Diagrams for Heat-Resistant Steels

Kucher

Prikhod’ko

2015

Strength Mater

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UDC 539.434 Known parametric methods and a modified base diagram method were used to analyze extrapolation results for creep rupture diagrams of heat-resistant steels. Two model alternatives are examined: viz when the hypothesis of the "unified" curve is valid and when its application leads to significant errors in prediction of creep strain processes. The efficiency of proposed procedures and their advantages over other approaches are demonstrated.Keywords: extrapolation, parametric methods, creep rupture diagrams, modified base diagram method. Introduction.Nowadays the life extension of critical structural elements, in particular in heat power engineering of Ukraine, is a currently central problem. Analysis of the condition of constructions and feasibility of their further service is based on creep rupture diagrams of the materials. The latter are plotted by the test results of the specimens in uniaxial and multiaxial stress states under the action of constant stresses and temperatures [1][2][3][4][5]. Creep rupture tests can last from several days to tens of years. Therefore, the construction of mathematical models for creep rupture prediction has been and remains the urgent goal of engineering practice.Despite a great number of creep rupture prediction methods of the materials, the Larson-Miller, OrrSherby-Dorn, Manson-Haferd, Trunin parametric relationships have received the widest practical acceptance [6][7][8][9].The relationships, which reduce the description of the set of creep rupture curves to that of the "unified" curve covering all test temperatures, are termed parametric ones. Then the function that approximates experimental results takes the form s h = F 1 ( ) or t h = F 2 ( ),

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“…The method is based on the concept of the base diagram, which is described by the relationship [5] log(~( , )) .…”

Section: Major Hypotheses Of the Modified Base Diagram Methods (Mbdm)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The new procedure of creep rupture prediction employing base diagrams [5] was proposed in [11]. But stress levels for chosen durability are refined with the residual function.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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