Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-28T05:39:34.635Z Has data issue: false hasContentIssue false
  • English
  • Français

High Throughput Determination of Creep Parameters Using Cantilever Bending: Part II - Primary and Steady-State through Uniaxial Equivalency

Published online by Cambridge University Press:  18 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]
Get access

Abstract

The stress and hence strain fields in a cantilever deforming as per power-law creep vary across the length and thickness of the sample, which allow obtaining multiple stress–strain pairs from a single test. Here, a high-throughput method is described to quantify the primary-cum-steady-state creep response of materials by testing a single cantilever sample in bending and mapping strain fields using digital image correlation. The method is based on the existence of stress invariant points in a cantilever, where the value of stress does not change during creep. It is demonstrated that strain evolution throughout primary and steady-state stages at these points is identical to the creep response obtained under uniaxial tests. Furthermore, the gained insights were exploited to obtain various parameters of a power-law type primary-cum-steady-state creep equation by testing only one cantilever sample. The developed method allows obtaining uniaxial creep curves at multiple stresses by testing a single cantilever, thereby reducing the time and number of samples required to understand the creep behavior of a material. The method has been validated by performing bending tests on Al and comparing the results with those of corresponding uniaxial tests.

Keywords

stress invariant locationsbending creepprimary and steady-state creepuniaxial creep parametersalternate creep testing methodologies
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 4 , 28 February 2020 , pp. 362 - 371
Copyright
Copyright © Materials Research Society 2020

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Jalali, S.I.A., Kumar, P., and Jayaram, V.: Creep of metallic materials in bending. JOM 71, 3563 (2019).CrossRefGoogle Scholar
Jalali, S.I.A., Kumar, P., and Jayaram, V.: “High Throughput Determination of Creep Parameters Using Cantilever Bending: Part I - Steady-State”. J. Mater. Res. (2020). (In review).Google Scholar
Jalali, S. I. A.: Evaluation of Power-Law Creep in Bending, PhD Thesis, Indian Institute of Science, Bangalore, India (2020).Google Scholar
Hosseini, E., Kalyanasundaram, V., Li, X., and Holdsworth, S.R.: Effect of prior deformation on the subsequent creep and anelastic recovery behaviour of an advanced martensitic steel. Mater. Sci. Eng., A 717, 68 (2018).CrossRefGoogle Scholar
Kowalewski, Z.: Creep Structure (Springer Berlin Heidelberg, Berlin, Heidelberg, 1991); pp. 115–122.CrossRefGoogle 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., Tu, S., Xie, G., Shao, S., and Cao, L.: Materials Fabrication, Vol. 6B (ASME 2018 Pressure Vessels and Piping Conference, was held in Prague, Czech Republic, American Society of Mechanical Engineers, 2018); pp. PVP2018-84135, V06BT06A062.Google Scholar
Boyle, J.T. and Spence, J.: Stress Analysis for Creep (Butterworth-Heinemann, London 1983).Google Scholar
MacCullough, G.H.: An experimental and analytical investigation of creep in bending. J. Appl. Mech. 55, 9 (1933).Google 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
Woodford, D.A.: Measurement and interpretation of the stress dependence of creep at low stresses. Mater. Sci. Eng. 4, 146 (1969).CrossRefGoogle Scholar
Kassner, M.E.: Fundamentals of Creep in Metals and Alloys (Butterworth-Heinemann, Elsevier, Boston 2015).Google Scholar