FORMATION OF THE SIGMA-PHASE DURING LONG-TERM HIGH-TEMPERATURE CREEP OF TYPE-316 AUSTENITIC STAINLESS-STEEL

被引：25
作者：
CHASTELL, DJ
FLEWITT, PEJ
机构：
[1] Central Electricity Generating Board, South Eastern Region, Scientific Services Department, Scientific Services Centre, Canal Road, Gravesend, Kent
来源：
MATERIALS SCIENCE AND ENGINEERING | 1979年 / 38卷 / 02期
关键词：
D O I：
10.1016/0025-5416(79)90091-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The examination of a failed type 316 austenitic stainless steel secondary superheater boiler tube is described. This tube failed in a time of 2 × 108 s which was significantly shorter than the original design life owing to the accumulation of grain boundary creep cavities leading to intergranular fracture. A comparison is made with samples taken from an adjacent tube which experienced a gas flow regime such that it would operate at a lower temperature. The results are discussed in terms of the kinetics of σ phase precipitation and its contribution to the subsequent formation of creep cavities and change in creep strength. © 1979.
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页码：153 / 162
页数：10
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