The effect of prior austenite grain size on hydrogen embrittlement of Co-containing 18Ni 300 maraging steel

被引：42

作者：

Gomes da Silva, Marcelo J. ^{[1
]}

Cardoso, Jorge L. ^{[1
]}

Carvalho, Dayane S. ^{[1
]}

Santos, Luis P. M. ^{[2
]}

Herculano, Luis Flavio G. ^{[1
]}

Gomes de Abreu, Hamilton F. ^{[1
]}

Pardal, Juan M. ^{[3
]}

机构：

[1] Univ Fed Ceara, Dept Engn Met & Mat, Campus Pici,Bloco 729-730, BR-60445554 Fortaleza, Ceara, Brazil

[2] Univ Fed Ceara, Programa Posgrad Quim, Campus Pici,Bloco 939-940, BR-60400900 Fortaleza, Ceara, Brazil

[3] Univ Fed Fluminense, Dept Engn Mecan, Campus Praia Vermelha,Rua Passo Patria, BR-24210240 Niteroi, RJ, Brazil

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 33期

关键词：

Maraging steel; Hydrogen embrittlement; Prior austenite; Grain sizes; Hydrogen-induced cracking; ASSISTED CRACK-GROWTH; PRECIPITATION REACTIONS; MECHANICAL-PROPERTIES; MICROSTRUCTURE; SUSCEPTIBILITY; DEFORMATION; TEMPERATURE; STRAIN;

D O I：

10.1016/j.ijhydene.2019.05.074

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of the prior austenite grain sizes in hydrogen embrittlement of Co-containing 18Ni 300 maraging steel were studied employing Slow Strain Rate Testing (SSRT) in 0.6 M NaCl electrolyte under simultaneuos cathodic polarization. The material was susceptible to hydrogen embrittlement in all investigated conditions. In addition, the examination of the fractured surface revealed that the presence of hydrogen in steel promotes the formation of quasi-cleavage regions and hydrogen-induced cracks along the grain boundaries. However, the refining of the prior austenite grain allowed an improvement in the HE resistance. Moreover, EBSD analysis showed that intergranular cracks propagated along to grain boundaries orientated to {001} planes parallel to normal direction, whereas they were deflected on {101} and {111} crystallographic planes. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：18606 / 18615

页数：10

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