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http://dx.doi.org/10.3365/KJMM.2012.50.4.280

A Study on the Mechanical Properties of Weldments for AISI 409L Ferritic Stainless Steel  

Lee, Sang Hwa (Department of Materials Science and Engineering, Dong-A University)
Shin, Yong Taek (Department of Material Research, Samsung Heavy Industries Co., Ltd.)
Lee, Hae Woo (Department of Materials Science and Engineering, Dong-A University)
Publication Information
Korean Journal of Metals and Materials / v.50, no.4, 2012 , pp. 280-284 More about this Journal
Abstract
In this study, we prepared a sample of AISI 409L weld metals using automotive exhaust manifolds and evaluated their corrosion properties by conducting an anodic polarization test after 10 minute of heat treatment at $900^{\circ}C$. The specimens of AISI 409L transformed fully ferrite. Weld metal was refined more than base metal. Specimen of heat treatment at $900^{\circ}C$ and as weld specimen was formed precipitation. However heat treatment specimen was bulkly formed and coarser than the as weld specimen. The strength measured by 10 Hv highly at heat treatment specimens in comparison with as weld. The increase in strength is attributed to the precipitation of Ti. The result of heat treatment suggest that there was a decrease of current density and high corrosion potential. Following heat treatment process produced Ti precipitation and for this reason, it can restrain Cr-carbide so that steel will have more corrosion resistance.
Keywords
metals; welding; precipitation; scanning electron microscopy (SEM); ferritic stainless steel;
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