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Title: Hydrogen effects on the character of dislocations in high-purity aluminum

Abstract

The effect of hydrogen in solid solution on the edge/screw character of dislocations has been investigated by deforming samples of high-purity aluminum in a gaseous hydrogen environment in situ in a controlled environment transmission electron microscope. Solute hydrogen was found to stabilize edge segments of dislocations, which inhibited, and in some cases stopped dislocations from cross-slipping. Removal of hydrogen from the sample allowed the cross-slip process to continue. These observations provide an explanation for the macroscopic observation that hydrogen in solid solution can promote slip planarity.

Authors:
; ;  [1]
  1. Univ. of Illinois, Urbana, IL (United States)
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
684399
DOE Contract Number:  
FG02-91ER45439
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 47; Journal Issue: 10; Other Information: PBD: 10 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DISLOCATIONS; ALUMINIUM; HYDROGEN ADDITIONS; SOLID SOLUTIONS; METALLURGICAL EFFECTS; SLIP; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Ferreira, P.J., Robertson, I.M., and Birnbaum, H.K. Hydrogen effects on the character of dislocations in high-purity aluminum. United States: N. p., 1999. Web. doi:10.1016/S1359-6454(99)00156-1.
Ferreira, P.J., Robertson, I.M., & Birnbaum, H.K. Hydrogen effects on the character of dislocations in high-purity aluminum. United States. doi:10.1016/S1359-6454(99)00156-1.
Ferreira, P.J., Robertson, I.M., and Birnbaum, H.K. Tue . "Hydrogen effects on the character of dislocations in high-purity aluminum". United States. doi:10.1016/S1359-6454(99)00156-1.
@article{osti_684399,
title = {Hydrogen effects on the character of dislocations in high-purity aluminum},
author = {Ferreira, P.J. and Robertson, I.M. and Birnbaum, H.K.},
abstractNote = {The effect of hydrogen in solid solution on the edge/screw character of dislocations has been investigated by deforming samples of high-purity aluminum in a gaseous hydrogen environment in situ in a controlled environment transmission electron microscope. Solute hydrogen was found to stabilize edge segments of dislocations, which inhibited, and in some cases stopped dislocations from cross-slipping. Removal of hydrogen from the sample allowed the cross-slip process to continue. These observations provide an explanation for the macroscopic observation that hydrogen in solid solution can promote slip planarity.},
doi = {10.1016/S1359-6454(99)00156-1},
journal = {Acta Materialia},
number = 10,
volume = 47,
place = {United States},
year = {1999},
month = {8}
}