A new method for fracture toughness determination of graded (Pt,Ni)Al bond coats by microbeam bend tests

Jaya, Nagamani B and Jayaram, Vikram and Biswas, Sanjay Kumar (2012) A new method for fracture toughness determination of graded (Pt,Ni)Al bond coats by microbeam bend tests. In: PHILOSOPHICAL MAGAZINE, 92 (25-27,). pp. 3326-3345.

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Abstract

A novel method is proposed for fracture toughness determination of graded microstructurally complex (Pt,Ni)Al bond coats using edge-notched doubly clamped beams subjected to bending. Micron-scale beams are machined using the focused ion beam and loaded in bending under a nanoindenter. Failure loads gathered from the pop-ins in the load-displacement curves combined with XFEM analysis are used to calculate K-c at individual zones, free from substrate effects. The testing technique and sources of errors in measurement are described and possible micromechanisms of fracture in such heterogeneous coatings discussed.

Item Type:	Journal Article
Publication:	PHILOSOPHICAL MAGAZINE
Publisher:	TAYLOR & FRANCIS LTD
Additional Information:	Copyright for this article belongs to Taylor and Francis
Keywords:	microbeam; bond coat; focused ion beam; fracture toughness; finite element modeling
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	31 Jan 2013 12:44
Last Modified:	31 Jan 2013 12:44
URI:	http://eprints.iisc.ac.in/id/eprint/45304

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