Experimental Study on the Effect of CGHAZ Microstructure on CTOD of High-Strength Steel EQ56

Abstract:

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The CGHAZ Microstructure has great effect on the toughness of welding joints and CTOD. This paper discussed the relationship between the CGHAZ and CTOD .The samples, carried out on high-strength steel EQ56, were observed by scanning electron microscopy. The Microstructural analysis result shows CGHAZ microstructure of EQ56-5, presenting high CTOD with 0.272mm, is low-carbon lath martensite and little M-A constituent, which contribute to the better toughness of EQ56-5. CGHAZ microstructure of EQ56-4, presenting the low CTOD with 0.082 mm, contains M-A constituent. The M-A constituent makes the CGHAZ brittle. The crack would grow easily along the M-A grain boundaries.

Info:

Periodical:

Edited by:

Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen

Pages:

1874-1879

DOI:

10.4028/www.scientific.net/AMM.117-119.1874

Citation:

Z. Y. Xia et al., "Experimental Study on the Effect of CGHAZ Microstructure on CTOD of High-Strength Steel EQ56", Applied Mechanics and Materials, Vols. 117-119, pp. 1874-1879, 2012

Online since:

October 2011

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$35.00

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