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http://dx.doi.org/10.3795/KSME-A.2013.37.11.1339

Spherical Indentation Techniques for Creep Property Evaluation Considering Transient Creep  

Lim, Dongkyu (Dept. of Mechanical Engineering, Sogang Univ.)
Lee, Jin Haeng (Reactor Mechanical Engineering Division, Korea Atomic Energy Research Institute)
Kim, Minsoo (Dept. of Mechanical Engineering, Sogang Univ.)
Lee, Hyungyil (Dept. of Mechanical Engineering, Sogang Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.11, 2013 , pp. 1339-1347 More about this Journal
Abstract
Creep through nanoindentations has attracted increasing research attention in recent years. Many studies related to indentation creep tests, however, have simply focused on the characteristics of steady-state creep, and there exist wide discrepancies between the uniaxial test and the indentation test. In this study, we performed a computational simulation of spherical indentations, and we proposed a method for evaluating the creep properties considering transient creep. We investigated the material behavior with variation of creep properties and expressed it using regression equations for normalized variables. We finally developed a program to evaluate the creep properties considering transient creep. By using the proposed method, we successfully obtained creep exponents with an average error less than 1.1 and creep coefficients with an average error less than 2.3 from the load-depth curve.
Keywords
Transient Creep; Material Property; Spherical Indentation; FEA;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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