Effect of homogenizing and age hardening on mechanical property enhancement of TIG welded Al6061 SICp composites

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Abstract

This paper explains the type of heat treatments used to improve the bulk hardness and tensile properties of Tungsten Inert Gas (TIG) welded Al6061-SiC reinforced composites. Composites with 8, 10 and 12 wt% of SiC (25 μm) are TIG welded using ER5356 filler material and the hardness, tensile property and microstructural analysis in as weld condition is carried out. Age hardening heat treatment is performed and peak hardness values are noted at different aging temperatures and subjected to characterization. Al6061-12 wt% SiC shows reduction in tensile strength in comparison with the other two in spite of improvement in hardness. Since hardness is more, there arise ambiguity in knowing the actual cause of decrease in the tensile strength. Optical micrographs of the samples are taken and identified the presence of dendritic segregation as the actual cause for the (UTS) reduction. To remove dendritic segregation, all the as weld samples are subjected to 5h homogenizing at 500°C, age hardened and characterized. The result showed substantial hike in UTS with substantial improvement in hardness, homogeneous distribution of hardness over the cross-section in the weld bead. The depth and distribution of hardness and bulk property improvement are observed by the combined effect of homogenizing and low temperature age hardening.

Original languageEnglish
Title of host publication5th Asia Conference on Mechanical and Materials Engineering - 5th ACMME 2017
PublisherTrans Tech Publications Ltd
Pages89-93
Number of pages5
ISBN (Print)9783035712919
DOIs
Publication statusPublished - 01-01-2017
Event5th Asia Conference on Mechanical and Materials Engineering, ACMME 2017 - Tokyo, Japan
Duration: 09-06-201711-06-2017

Publication series

NameMaterials Science Forum
Volume909 MSF
ISSN (Print)0255-5476

Conference

Conference5th Asia Conference on Mechanical and Materials Engineering, ACMME 2017
CountryJapan
CityTokyo
Period09-06-1711-06-17

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Jayashree, P. K., Sharma, S. S., & Shetty, R. (2017). Effect of homogenizing and age hardening on mechanical property enhancement of TIG welded Al6061 SICp composites. In 5th Asia Conference on Mechanical and Materials Engineering - 5th ACMME 2017 (pp. 89-93). (Materials Science Forum; Vol. 909 MSF). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.909.89