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2016 (Vol. 13, Issue: 11)
Research Article

Study of Residual Stress Relaxation Mechanics Using a Micro-indent Method

1F.V. Diaz, 1C.A. Mammana and 2A.P.M. Guidobono
1Departamento de Ingeniería Electromecánica-Departamento de Ingeniería Industrial, Facultad Regional Rafaela, Universidad Tecnológica Nacional, Acuña 49, 2300 Rafaela, Argentina
2División Metrología Dimensional, Centro Regional Rosario (INTI), Ocampo y Esmeralda, 2000 Rosario, Argentina

DOI: 10.19026/rjaset.13.3425
Submitted Accepted Published
August 23, 2016 October 12, 2016 December 05, 2016

  How to Cite this Article:

1F.V. Diaz, 1C.A. Mammana and 2A.P.M. Guidobono, 2016. Study of Residual Stress Relaxation Mechanics Using a Micro-indent Method.  Research Journal of Applied Sciences, Engineering and Technology, 13(11): 835-842.

DOI: 10.19026/rjaset.13.3425

URL: http://www.maxwellsci.com/jp/mspabstract.php?jid=RJASET&doi=rjaset.13.3425


The aim of this study is to show the feasibility and accuracy of a micro-indent method to comprehensively evaluate the relaxation mechanics of residual stress in specimens of rolled aluminium alloy. This micro-indent method was adapted to implement four annealing treatments. The residual displacements were measured using a high-accuracy measuring machine, which enables to decrease the absolute error down to ±300 nm. This study presents an innovative data analysis using Mohr's circles, which allowed to study all directions of the in-plane residual stress for different relaxation times. The results revealed that the relaxation process finishes when the residual stress relief is completed in some preferential directions and then, a brief stress recovery phase begins.

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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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