Fracture Toughness and Crack Resistance of Steam Pipeline Steel in Initial and Used States

被引：12

作者：

M. Zrilic

Z. Burzic

Z. Cvijovic

机构：

[1] Belgrade University,Faculty of Technology and Metallurgy

[2] Military Technical Institute,undefined

来源：

Strength of Materials | 2004年 / 36卷 / 1期

关键词：

steam pipeline; fracture; local approach of fracture mechanics; metallographic analysis; tensile testing; crack resistance; fatigue strength;

D O I：

10.1023/B:STOM.0000020114.57953.e9

中图分类号：

学科分类号：

摘要：

Premature fracture of steam pipelines from 14MoV6 3 steel designed for 100,000 h service life at 540°C has been studied. Test specimens are manufactured from steel in the initial state and after 117 h of operation. Application of the local approach to fracture and the metallographic analysis, in addition to classical methods (tensile, crack resistance, and fatigue strength tests), provided a more precise evaluation of steel properties degradation due to elevated temperatures and stresses. Urgency of further development of the local approach to predicting material fracture after long-term operation at high temperatures has been substantiated.

引用

页码：47 / 58

页数：11

共 10 条

[1]

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[2]

Zrilic M.(2003)The effect of long-term exposure to elevated temperature on steam line steel properties Thermal Science 7 33-46

[3]

Aleksic R.(1982)Ductile fracture by cavity nucleation between larger voids J. Mech. Phys. Solids 30 265-286

[4]

Tvergaard V.(1969)On the ductile enlargement of voids in triaxial stress fields J. Mech. Phys. Solids 17 201-217

[5]

R. Rice J.(2000)Assessment of in-service degradation of steam pipeline steel by local approach method Life Assessment and Management for Structural Components 1 247-253

[6]

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[10]

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