Relationships between the work recovery ratio of indentation and plastic parameters for instrumented spherical indentation. (23rd March 2015)

• Record Type: Journal Article
• Authors: Yu, Chang; Yang, Rong; Feng, Yihui; Huan, Yong; Peng, Guangjian; Zhang, Taihua
• Is Part Of: MRS communications. Volume 5:Number 1(2015:Mar.)
• Page Start: 89
• Page End: 94
• Publication Date: 2015-03-23
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1557/mrc.2015.10
• Languages: English
• ISSNs: 2159-6859

Abstract

Abstract: Abstract : This paper aims to obtain an analytical expression for the ratio of unloading work of indentation ( W u ) to total loading work of indentation ( W t ) (work recovery ratio of indentation) in instrumented spherical indentation. The expanding cavity model and Lamé solution are used. Three typical stress–strain relations (elastic-perfectly plastic, linear hardening, and power-law hardening) are analyzed. The results of finite-element method coincide with the expressions. The expressions show that the work recovery ratio of indentation is just related to plastic parameters. Furthermore, elastic work ( W e ) are obtained, and it is proved that W e should be distinguished from W u in spherical indentation.