EFFECTS OF ROLLING ON THE SPECIAL GRAIN BOUNDARIES AND INTERGRANULAR CORROSION OF ALLOY 690

J Chin Soc Corr Pro

2012, Vol. 32

Issue (4): 296-299 DOI:

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EFFECTS OF ROLLING ON THE SPECIAL GRAIN BOUNDARIES AND INTERGRANULAR CORROSION OF ALLOY 690

FENG Wanli¹, ZHANG Lefu¹, MA Mingjuan²

1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240
2. Special Steel Branch, BaoSteel Co. Ltd, Shanghai 200940

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Abstract Alloy 690 specimens were deformed by rolling and followed by solution treatment at 1120℃ for 5 min and thermal treatment at 720℃ for 10 h. Grain size, special grain boundary concentration and resistance to intergranular corrosion were evaluated. The results show that the grain size number increases with the increase of deformation, concentration of special boundaries reaches the maximum of 67.7% for specimens with 5% plastic deformation, and decrease with the increase of deformation, and the concentration of special boundaries of specimens with 67{\%} deformation decreases to 25.4%. Intergranular corrosion was evaluated using ASTM G28-A method, and specimens with 5% deformation show the lowest weight loss rate.

Key words: alloy 690 grain size intergranular corrosion grain boundary engineering special boundary

Received: 20 July 2011

ZTFLH:

TG113

Corresponding Authors: ZHANG Lefu E-mail: lfzhang@sjtu.edu.cn

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FENG Wanli, ZHANG Lefu, MA Mingjuan. EFFECTS OF ROLLING ON THE SPECIAL GRAIN BOUNDARIES AND INTERGRANULAR CORROSION OF ALLOY 690. J Chin Soc Corr Pro, 2012, 32(4): 296-299.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I4/296

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