Study of grain boundary character along intergranular stress corrosion crack paths in austenitic alloys

被引：366

作者：

Gertsman, VY ^{[1
]}

Bruemmer, SM ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

ACTA MATERIALIA | 2001年 / 49卷 / 09期

关键词：

grain boundaries; stress corrosion; transmission electron microscopy (TEM); scanning electron microscopy (SEM); nickel and iron stainless alloys;

D O I：

10.1016/S1359-6454(01)00064-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Samples of austenitic stainless alloys were examined by means of scanning and transmission electron microscopy. Misorientations were measured by electron backscattered diffraction. Grain boundary distributions were analyzed with special emphasis on the grain boundary character along intergranular stress corrosion cracks and at crack arrest points. It was established that only coherent twin Sigma3 boundaries could be considered as "special" ones with regard to crack resistance. However, it is possible that twin interactions with random grain boundaries may inhibit crack propagation. The results suggest that other factors besides geometrical ones play an important role in the intergranular stress corrosion cracking of commercial alloys. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：1589 / 1598

页数：10

共 17 条

[11] THE INFLUENCE OF GRAIN-BOUNDARY GEOMETRY ON INTERGRANULAR CRACK-PROPAGATION IN NI3AL [J].

LIN, H ;

POPE, DP .

ACTA METALLURGICA ET MATERIALIA, 1993, 41 (02) :553-562

[12] WEAK GRAIN-BOUNDARIES IN NI3AL [J].

LIN, H ;

POPE, DP .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1995, 192 :394-398

[13] Grain-boundary structure effects on intergranular stress corrosion cracking of Alloy X-750 [J].

Pan, Y ;

Adams, BL ;

Olson, T ;

Panayotou, N .

ACTA MATERIALIA, 1996, 44 (12) :4685-4695

[14]

Scott PM, 1999, PROCEEDINGS OF THE NINTH INTERNATIONAL SYMPOSIUM ON ENVIRONMENTAL DEGRADATION OF MATERIALS IN NUCLEAR POWER SYSTEMS-WATER REACTORS, P3

[15]

Thomas L. E., 2000, P 9 INT C ENV DEGR M, P72

[16] High-resolution characterization of intergranular attack and stress corrosion cracking of Alloy 600 in high-temperature primary water [J].

Thomas, LE ;

Bruemmer, SM .

CORROSION, 2000, 56 (06) :572-587

[17]

WATANABE T, 1984, RES MECH, V11, P47

← 1 2 →