Fracture toughness and hydrogen embrittlement susceptibility on the interface of clad steel pipes with and without a Ni-interlayer

被引：14
|
作者：
Jemblie, L. [1 ]
Bjaaland, H. [1 ,3 ]
Nyhus, B. [2 ]
Olden, V. [2 ]
Akselsen, O. M. [1 ,2 ]
机构：
[1] NTNU, Dept Engn Design & Mat, N-7456 Trondheim, Norway
[2] SINTEF Mat & Chem, N-7456 Trondheim, Norway
[3] Technip Norge AS, Gronora Ind, N-7300 Orltanger, Norway
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 685卷
关键词：
Clad pipe; Cladding; Hydrogen embrittlement; Fracture toughness; Electroplating; Interface; ENVIRONMENT-ASSISTED CRACKING; LOW-CARBON STEEL; MICROSTRUCTURE; STAINLESS;
D O I：
10.1016/j.msea.2016.12.116
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The objective of the present work has been to study the fracture properties of the interface between clad and base material of two 316 L austenitic stainless steel- X60/X65 carbon steel hot roll bonded clad pipes; with and without a Ni-interlayer. Fracture mechanical tests were performed in air and under in situ electrochemical hydrogen charging to establish crack growth resistance curves and fracture initiation toughness for both systems. The results revealed that an electroplated Ni-interlayer reduces the fracture initiation toughness for testing in air, while it raises the fracture initiation toughness for testing in hydrogen environment. The samples with a Ni-interlayer revealed little influence of hydrogen on the fracture resistance, with a reduction in the fracture initiation toughness of 20%, attributed to crack propagation mainly occurring in the nickel layer. The samples without a Ni-interlayer revealed a strong influence of hydrogen on the fracture resistance, with a reduction in the fracture initiation toughness of 85%. An alternating crack path was proven, shifting between the dissimilar interface and the base material adjacent to the interface.
引用
收藏
页码：87 / 94
页数：8
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