Influence of friction stir processing on microstructure and properties of AA7075/TiB2 in situ composite

H. B.Michael Rajan; I. Dinaharan; S. Ramabalan; E. T. Akinlabi

doi:10.1016/j.jallcom.2015.10.108

Influence of friction stir processing on microstructure and properties of AA7075/TiB₂ in situ composite

H. B.Michael Rajan, I. Dinaharan, S. Ramabalan, E. T. Akinlabi

Mechanical Engineering Science

Research output: Contribution to journal › Article › peer-review

97 Citations (Scopus)

Abstract

Friction stir processing (FSP) is a novel solid state method to homogenize the distribution of particles in aluminum matrix composites (AMCs). AA7075/TiB₂ AMCs were prepared by the in situ reaction of inorganic salts K₂TiF₆ and KBF₄ with molten aluminum. The microstructure, before and after FSP, was studied using optical and scanning electron microscopy. TiB₂ particles were segregated and clustered at the grain boundaries. The fabricated composite was subjected to single pass FSP using a friction stir welding machine. FSP changed the distribution of TiB₂ particles to be intragranular. TiB₂ particles fragmented during FSP and were rounded due to the abrading action of the rotating tool. FSP significantly enhanced the mechanical and wear properties of the composite. The details of fracture morphology, worn surface and wear debris are also presented in this paper.

Original language	English
Pages (from-to)	250-260
Number of pages	11
Journal	Journal of Alloys and Compounds
Volume	657
DOIs	https://doi.org/10.1016/j.jallcom.2015.10.108
Publication status	Published - 5 Feb 2016

Keywords

Grain boundaries
Mechanical properties
Metal matrix composites
Microstructure

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2015.10.108

Cite this

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title = "Influence of friction stir processing on microstructure and properties of AA7075/TiB2 in situ composite",

abstract = "Friction stir processing (FSP) is a novel solid state method to homogenize the distribution of particles in aluminum matrix composites (AMCs). AA7075/TiB2 AMCs were prepared by the in situ reaction of inorganic salts K2TiF6 and KBF4 with molten aluminum. The microstructure, before and after FSP, was studied using optical and scanning electron microscopy. TiB2 particles were segregated and clustered at the grain boundaries. The fabricated composite was subjected to single pass FSP using a friction stir welding machine. FSP changed the distribution of TiB2 particles to be intragranular. TiB2 particles fragmented during FSP and were rounded due to the abrading action of the rotating tool. FSP significantly enhanced the mechanical and wear properties of the composite. The details of fracture morphology, worn surface and wear debris are also presented in this paper.",

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AU - Rajan, H. B.Michael

AU - Dinaharan, I.

AU - Ramabalan, S.

AU - Akinlabi, E. T.

PY - 2016/2/5

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N2 - Friction stir processing (FSP) is a novel solid state method to homogenize the distribution of particles in aluminum matrix composites (AMCs). AA7075/TiB2 AMCs were prepared by the in situ reaction of inorganic salts K2TiF6 and KBF4 with molten aluminum. The microstructure, before and after FSP, was studied using optical and scanning electron microscopy. TiB2 particles were segregated and clustered at the grain boundaries. The fabricated composite was subjected to single pass FSP using a friction stir welding machine. FSP changed the distribution of TiB2 particles to be intragranular. TiB2 particles fragmented during FSP and were rounded due to the abrading action of the rotating tool. FSP significantly enhanced the mechanical and wear properties of the composite. The details of fracture morphology, worn surface and wear debris are also presented in this paper.

AB - Friction stir processing (FSP) is a novel solid state method to homogenize the distribution of particles in aluminum matrix composites (AMCs). AA7075/TiB2 AMCs were prepared by the in situ reaction of inorganic salts K2TiF6 and KBF4 with molten aluminum. The microstructure, before and after FSP, was studied using optical and scanning electron microscopy. TiB2 particles were segregated and clustered at the grain boundaries. The fabricated composite was subjected to single pass FSP using a friction stir welding machine. FSP changed the distribution of TiB2 particles to be intragranular. TiB2 particles fragmented during FSP and were rounded due to the abrading action of the rotating tool. FSP significantly enhanced the mechanical and wear properties of the composite. The details of fracture morphology, worn surface and wear debris are also presented in this paper.

KW - Grain boundaries

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