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Effect of Aluminium on Mechanical Properties of low strength low alloy Welds
Rakesh Sharma,  Vishnu Singh,  Manvendra Singh
The effect of filler metal composition on the microstructure and mechanical prop erties of fourwire tandem submerged arc welded API 5LX65 steel was investigated. Microhardness, izod impact, and allweld longitudinal round tensile tests were ap plied to evaluate the mechanical properties of the weld metals. The microstructure of specimens was studied by optical and scanning electron microscopes. The structural observations showed that the more acicular ferrite was formed in the microstructure, the better mechanical properties were achieved. The impact energy and strength values were higher for the specimen containing more amounts of tita nium and boron. The brittletoductile transition temperature could be decreased by increasing the amount of acicular ferrite. For the microstructure with 80% acicular ferrite, the impact energy was about 70 J at –60°C. The addition of titanium dispersed fine oxide inclusions and facilitated the nucleation of acicular ferrite in the microstructure. The oxide particles with a size of 2 µm acted as the nucleation sites of acicular ferrite.
Keywords- Mechanical Properties, Filler Metal, Tandem Submerged Arc Welding (TSAW), Microstructure, API 5LX65 Pipe
Unique Identification Number - IJEDR1904123Page Number(s) - 745-753Pubished in - Volume 7 | Issue 4 | December 2019DOI (Digital Object Identifier) -    Publisher - IJEDR (ISSN - 2321-9939)
Cite this Article
Rakesh Sharma,  Vishnu Singh,  Manvendra Singh,   "Effect of Aluminium on Mechanical Properties of low strength low alloy Welds"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.7, Issue 4, pp.745-753, December 2019, Available at :http://www.ijedr.org/papers/IJEDR1904123.pdf