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http://dx.doi.org/10.5781/KWJS.2010.28.3.099

Correlation Between M-A Constituents and Tensile Properties in the Intercritical Coarse Grained HAZ of an Ultra Low Carbon Steel  

Lee, Yoon-Ki (Div. of Mater. Sci. and Eng., Hanyang University)
Moon, Joon-Oh (Div. of Mater. Sci. and Eng., Hanyang University)
Kim, Sang-Hoon (Div. of Mater. Sci. and Eng., Hanyang University)
Lee, Chang-Hee (Div. of Mater. Sci. and Eng., Hanyang University)
Publication Information
Journal of Welding and Joining / v.28, no.3, 2010 , pp. 99-103 More about this Journal
Abstract
It is well known that martensite-austenite (M-A) constituents are formed in the intercritically reheated coarse grained heat affected zone (ICCGHAZ) of a multipass weld and they act on the local brittle zone (LBZ) in the welded structures. To investigate the effect of M-A constituents on the tensile properties of ICCGHAZ, specimens with M-A constituents of different volume fraction and size were prepared through the multipass welding cycles simulated by a Gleeble simulator and then tensile test was carried out. The results indicated that finely distributed M-A constituents contributed to decrease the yield ratio, which is mainly due to the increased tensile strength.
Keywords
M-A constituent; Tensile test; Yield ratio; ICCGHAZ; Nanoindentation;
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