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High Throughput Determination of Creep Parameters Using Cantilever Bending: Part I - Steady-State

Published online by Cambridge University Press:  19 February 2020

Syed Idrees Afzal Jalali ,
Praveen Kumar  and
Vikram Jayaram
Syed Idrees Afzal Jalali*
Affiliation:
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
Praveen Kumar*
Affiliation:
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
Vikram Jayaram*
Affiliation:
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
c)e-mail: [email protected]
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Abstract

Variation of stress across the length and thickness of a cantilever during creep allows obtaining multiple pairs of strain rates and stress under steady-state condition. This work applies digital image correlation (DIC) and conjugate analytical models to obtain several such “strain rate–stress” pairs during steady-state creep by testing a single cantilever at a constant applied load. Furthermore, these strain rate–stress pairs are used to accurately determine the stress exponent of the material (e.g., Al and Pb). In addition, an empirical observation of plotting strain rate as a function of stress at fixed strain during primary creep for estimating stress exponent is extended to bending creep, wherein strain rates of the points in the cantilever lying on an iso-strain contour were plotted against the moment at the point to determine stress exponent. This study, thereby, proves that the “bending creep–DIC” combination is a high throughput test methodology for studying steady-state creep.

Keywords

bending creepdigital image correlationhigh throughput testingsteady-state creepstress exponent
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 4 , 28 February 2020 , pp. 353 - 361
Copyright
Copyright © Materials Research Society 2020

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References

Poirier, J-P.: Creep of Crystals (Cambridge University Press, Cambridge, U.K., 1985).CrossRefGoogle Scholar
ASTM E139-11(2018), Standard Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials (2018).Google Scholar
Jalali, S.I.A., Kumar, P., and Jayaram, V.: Creep of metallic materials in bending. JOM 71, 3563 (2019).CrossRefGoogle Scholar
Tapsell, H.J. and Johnson, A.E.: An investigation of the nature of creep under stresses produced by pure flexure. Mon. J. Inst. Met. 58, 387 (1935).Google Scholar
Popov, E.P.: Bending of beams with creep. J. Appl. Phys. 20, 251 (1949).CrossRefGoogle Scholar
Hollenberg, G.W., Terwilliger, G.R., and Gordon, R.S.: Calculation of stresses and strains in four-point bending creep tests. J. Am. Ceram. Soc. 54, 196 (1971).CrossRefGoogle Scholar
Zhuang, F.K., Tu, S.T., Zhou, G.Y., and Wang, Q.Q.: A small cantilever beam test for determination of creep properties of materials. Fatigue Fract. Eng. Mater. Struct. 38, 257 (2015).CrossRefGoogle Scholar
Harris, G.T. and Child, H.C.: Creep testing by a cantilever-bending method. J. Iron Steel Inst. 165, 139 (1950).Google Scholar
Ragab, A.R.A.F. and Bayoumi, S.E.A.: Engineering Solid Mechanics: Fundamentals and Applications (CRC Press, Washington, D.C., 2018).CrossRefGoogle Scholar
Weertman, J.: Creep of indium, lead, and some of their alloys with various metals. Trans. Metall. Soc. 218, 207 (1960).Google Scholar
Jalali, S.I.A., Kumar, P., and Jayaram, V.: “High Throughput Determination of Creep Parameters Using Cantilever Bending: Part II - Primary and Steady-State through Uniaxial Equivalency”. J. Mater. Res. (2020).Google Scholar
Straub, S. and Blum, W.: Does the “natural” third power, law of steady state creep hold for pure aluminum? Scr. Mater. 24, 1837 (1990).CrossRefGoogle Scholar
Weertman, J.: Creep of aluminum single crystals. J. Appl. Phys. 27, 832 (1956).CrossRefGoogle Scholar
Kassner, M.E., Kumar, P., and Blum, W.: Harper-Dorn creep. Int. J. Plast. 23, 980 (2007).CrossRefGoogle Scholar
Woodford, D.A.: Measurement and interpretation of the stress dependence of creep at low stresses. Mater. Sci. Eng. 4, 146 (1969).CrossRefGoogle Scholar
Jalali, S.I.A., Kumar, P., and Jayaram, V.: A System and Method for Determination of Power Law Creep Parameters from a Single Bending Test Indian Patent Application No. 201941028031, 2019.Google Scholar
Sutton, M.A., Orteu, J., and Schreier, H.W.: Image Correlation for Shape, Motion and Deformation Measurements (Springer, New York, 2009).Google Scholar
Kassner, M.E.: Fundamentals of Creep in Metals and Alloys (Butterworth-Heinemann, Elsevier, Boston, Massachusetts, 2015).Google Scholar

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