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Title: Hydrogen induced cracking in Fe[sub 3]Al+Cr

Abstract

The room temperature embrittlement in air and the environment sensitivity of the ordered Fe[sub 3]Al alloy severely restrict its use. Recently, Liu et al. reported that room temperature ductility can be improved by the addition of chromium of 2 at%--6 at%. They found that with an additional chromium the fracture mode changed to one of approximately 50% transgranular cleavage and 50% intergranular failure. This experimental phenomenon was explained in terms of a combined effect of an easier cross slip, increasing cleavage strength and solid solution softening. The fracture surfaces of the hydrogen induced delayed fracture of the ordered Fe[sub 3]Al alloy, which cleavage fracture occurred at room temperature, are dependent upon K[sub I] and the hydrogen content. This work will investigate whether the fracture surfaces of hydrogen induced delayed fracture of ordered alloy Fe[sub 3]Al + Cr are dependent upon the K[sub I] and how the microstructure effects the hydrogen induced delayed fracture.

Authors:
; ;  [1]
  1. (Univ. of Science and Technology, Beijing (China). Dept. of Materials Physics)
Publication Date:
OSTI Identifier:
5227730
Resource Type:
Journal Article
Journal Name:
Scripta Metallurgica et Materialia; (United States)
Additional Journal Information:
Journal Volume: 30:5; Journal ID: ISSN 0956-716X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; HYDROGEN EMBRITTLEMENT; CHROMIUM ALLOYS; IRON ALLOYS; FRACTURE PROPERTIES; ALLOYS; EMBRITTLEMENT; MECHANICAL PROPERTIES; 360103* - Metals & Alloys- Mechanical Properties; 360105 - Metals & Alloys- Corrosion & Erosion

Citation Formats

Lin, J., Chu, W., and Hsiao, C. Hydrogen induced cracking in Fe[sub 3]Al+Cr. United States: N. p., 1994. Web. doi:10.1016/0956-716X(94)90433-2.
Lin, J., Chu, W., & Hsiao, C. Hydrogen induced cracking in Fe[sub 3]Al+Cr. United States. doi:10.1016/0956-716X(94)90433-2.
Lin, J., Chu, W., and Hsiao, C. Tue . "Hydrogen induced cracking in Fe[sub 3]Al+Cr". United States. doi:10.1016/0956-716X(94)90433-2.
@article{osti_5227730,
title = {Hydrogen induced cracking in Fe[sub 3]Al+Cr},
author = {Lin, J. and Chu, W. and Hsiao, C.},
abstractNote = {The room temperature embrittlement in air and the environment sensitivity of the ordered Fe[sub 3]Al alloy severely restrict its use. Recently, Liu et al. reported that room temperature ductility can be improved by the addition of chromium of 2 at%--6 at%. They found that with an additional chromium the fracture mode changed to one of approximately 50% transgranular cleavage and 50% intergranular failure. This experimental phenomenon was explained in terms of a combined effect of an easier cross slip, increasing cleavage strength and solid solution softening. The fracture surfaces of the hydrogen induced delayed fracture of the ordered Fe[sub 3]Al alloy, which cleavage fracture occurred at room temperature, are dependent upon K[sub I] and the hydrogen content. This work will investigate whether the fracture surfaces of hydrogen induced delayed fracture of ordered alloy Fe[sub 3]Al + Cr are dependent upon the K[sub I] and how the microstructure effects the hydrogen induced delayed fracture.},
doi = {10.1016/0956-716X(94)90433-2},
journal = {Scripta Metallurgica et Materialia; (United States)},
issn = {0956-716X},
number = ,
volume = 30:5,
place = {United States},
year = {1994},
month = {3}
}