Hydrogen Embrittlement Understood
- PDF / 3,309,422 Bytes
- 19 Pages / 593.972 x 792 pts Page_size
- 31 Downloads / 263 Views
Hydrogen Embrittlement Understood IAN M. ROBERTSON, P. SOFRONIS, A. NAGAO, M.L. MARTIN, S. WANG, D.W. GROSS, and K.E. NYGREN
IAN M. ROBERTSON
The connection between hydrogen-enhanced plasticity and the hydrogen-induced fracture mechanism and pathway is established through examination of the evolved microstructural state immediately beneath fracture surfaces including voids, ‘‘quasi-cleavage,’’ and intergranular surfaces. This leads to a new understanding of hydrogen embrittlement in which hydrogenenhanced plasticity processes accelerate the evolution of the microstructure, which establishes not only local high concentrations of hydrogen but also a local stress state. Together, these factors establish the fracture mechanism and pathway. DOI: 10.1007/s11661-015-2836-1 The Minerals, Metals & Materials Society and ASM International 2015
I.
INTRODUCTION
JOHNSON, in 1875, launched the field of study of hydrogen embrittlement of metals with the publication IAN M. ROBERTSON, Dean of the College of Engineering and a Professor, is with Department of Materials Science and Engineering and Department of Engineering Physics, University of Wisconsin – Madison, Madison, WI 53706, and also with International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka 819-0395, Japan. Contact e-mail: [email protected] P. SOFRONIS, James W. Bayne Professor, is with the Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, and also with International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University. A. NAGAO, Senior Researcher, is with International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, and also with Material Surface & Interface Science Research Department, Steel Research Laboratory, JFE Steel Corporation, 1-1 Minamiwataridacho, Kawasaki-ku, Kawasaki, Kanagawa 210-0855, Japan. M.L. MARTIN, Humboldt Postdoctoral Fellow, is with Institut fu¨r Materialphysik, Georg-August-Universita¨t Go¨ttingen, FriedrichHund-Platz 1, 37077 Go¨ttingen, Germany. S. WANG, Postdoctoral Fellow, is with International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, and also with Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo, Hokkaido 060-8628, Japan. D.W. GROSS, and K.E. NYGREN, Graduate Students, are METALLURGICAL AND MATERIALS TRANSACTIONS A
of his observations of the influence of immersing a piece of iron in different acids on the mechanical properties.[1] He summarized the macroscale effect as: ‘‘After a few
with the Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801. Ian M. Robertson is the Dean of the College of Engineering and a professor in Materials Science and Engineering as well as Engineering Physics at the University of Wisconsin-Madison. His research focuses on the use of the electron microscope
Data Loading...
