Microstructural Modification and Resultant Properties of Friction Stir Processed Cast NiAl Bronze


Friction stir processing (FSP) is being developed as a metal working tool to heal casting defects and modify microstructures in a cast NiAl bronze (NAB) alloy for the purpose of substantially increasing mechanical properties. the initial microstructural evolution and resultant mechanical properties for the variety of microstructures created by FSP are reported herein. the dominant microstructural morphologies created by FSP include Widmanstätten, equiaxed fine grain, and a banded or lamellar structure. These microstructures exist concurrently within the FSP zone at different locations and with different volume ratios. the mechanical properties of these different microstructures are established using a micro-tensile test procedure. in addition, bulk mechanical properties are presented to illustrate mechanical properties of the composite microstructure and the Widmanstätten microstructure as a single morphology.


Materials Science and Engineering

Keywords and Phrases

Friction Stir Processing; Mechanical Properties; Microstructure; NiAl Bronze

International Standard Serial Number (ISSN)

1662-9752; 0255-5476

Document Type

Article - Conference proceedings

Document Version


File Type





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Publication Date

01 Jan 2003