Effect of temperature on fracture toughness of SA508-III weld metal

被引：0

作者：

Li X. ^{[1
]}

Ding Z. ^{[1
]}

Bao S. ^{[1
]}

Gao Z. ^{[1
]}

机构：

[1] Engineering Research Center of Process Equipment and Remanufacturing, Zhejiang University of Technology, Hangzhou

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 07期

关键词：

Blunting line equation; Fracture toughness; SA508-III steel; Welded joint;

D O I：

10.12073/j.hjxb.2019400179

中图分类号：

学科分类号：

摘要：

In order to obtain the effect of temperature on fracture toughness of the SA508-III weld metal, the constitutive curve method (CCM), ASTM and ISO standard were applied to determine the fracture toughness of weld metal in typical temperature points. The fracture toughness value obtained from CCM showed a reduction trend with the increase of temperature. When the temperature increased from 20℃ to 100℃ and from 100℃ to 320℃, the fracture toughness value were reduced to 11.1% and 5.4%, respectively. SEM fracture photographs of Compact Tension specimens revealed that the tested SA508-III weld metal presented ductile fracture at test temperature points. However, when the temperature reached 100 to 320℃, dimples became shallow and small, which led to the decrease of fracture toughness. Moreover, this study also found that the fracture toughness obtained from CCM was the same as that of ASTM standard at 20℃ and 100℃, and intermediate between that of ASTM and ISO at 320℃. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.

引用

页码：44 / 47

页数：3

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