Micro Structural Growth, Residual Stress and Fatigue Behaviour of Metals/Non-Metals Obtained by Friction Stir Processing

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Dr. Ch. Srinivasa Rao, Kallam Haranadhareddy

Abstract

Friction stir processing is a method of joining materials by surface modification. The process is based on a similar principle as friction stir welding. Metals and alloys with improved surface properties are desirable in a variety of industrial applications. The limited mechanical and tribological properties of most metals and alloys make them not suitable for all applications. Furthermore, these properties have an effect on component service life.  As a result, there is an impetus for the creation of materials with improved properties. However, in Friction stir processing, the tool has a shoulder and pin and is rubbed over a single workpiece material. The changes in microstructure and in mechanical properties occur due to intensive plastic deformation. Thus, the present paper  aims to epitomize the research findings related to the changes in microstructure during friction stir processing. It also includes the influence of the microstructure on mechanical properties.

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