Degradation of microstructure and properties of an AISI 316L steel pipe after more than 100,000 hours usage at 640°C in a petrochemical industry

被引：9

作者：

de Moraes, Flavio Pereira ^{[1
]}

Alves Junior, Sandro Francisco ^{[1
]}

Plaut, Ronald Lesley ^{[1
]}

Padilha, Angelo Fernando ^{[1
]}

机构：

[1] Univ Sao Paulo EPUSP, Escola Politecn, Dept Engn Met & Mat, Av Prof Mello Moraes 2463,Cidade Univ, BR-05508930 Sao Paulo, SP, Brazil

来源：

3RD INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2019) | 2019年 / 17卷

关键词：

Degradation; 316L stainless steel; Microstructure; Mechanical properties; Intergranular corrosion; STAINLESS-STEEL;

D O I：

10.1016/j.prostr.2019.08.018

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

AISI 316L austenitic stainless steel is one of the most widely used in its steel class, especially at high temperature. In this work, samples for analysis were taken from a pipe of AISI 316L with a nominal 200 mm external diameter and 15 mm thick exposed for about 100,700 hours at 640 degrees C with an internal pressure of 4.5 MPa in a reactor of a petrochemical plant. Modifications in the microstructure, mechanical properties and corrosion resistance were investigated and the most significant results are presented. Results show the precipitation of intermetallic phases, mainly sigma phase at grain boundaries and inside the grains. Precipitation caused increased hardness, yield strength and ultimate tensile strength and decreased ductility, toughness and intergranular corrosion resistance. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页码：131 / 137

页数：7

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