Healing behavior of preexisting hydrogen micropores in aluminum alloys during plastic deformation

被引：72

作者：

Toda, H. ^{[1
]}

Minami, K. ^{[1
]}

Koyama, K. ^{[2
]}

Ichitani, K. ^{[2
]}

Kobayashi, M. ^{[1
]}

Uesugi, K. ^{[3
]}

Suzuki, Y. ^{[3
]}

机构：

[1] Toyohashi Univ Technol, Dept Prod Syst Engn, Aichi 4418580, Japan

[2] Furukawa Sky Aluminum Corp, Fukaya, Saitama 3668511, Japan

[3] Japan Synchrotron Radiat Res Inst, Mikazuki, Hyogo 6795198, Japan

来源：

ACTA MATERIALIA | 2009年 / 57卷 / 15期

关键词：

Aluminum alloys; Microtomography; Hydrogen; Micropore; Healing; TRAPPING STATES; PENETRATION; TOMOGRAPHY;

D O I：

10.1016/j.actamat.2009.06.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synchrotron X-ray microtomography was used to observe the shrinkage and annihilation behaviors of hydrogen micropores in three dimensions during hot and cold plastic deformation of an Al-Mg alloy. Whether complete healing of micropores is achieved after plastic deformation was examined by exposing the material to a high temperature after plastic deformation. Although micropores generally show a pattern of shrinking and closing, closer inspection of a single specimen revealed a variety of geometrically variable behaviors. It is noteworthy that some of the micropores are reinitiated in positions identical to those before their annihilation, even after an 8-22% macroscopic strain has been further applied after annihilation. We attribute local variations such as these to significant local strain variation, which we measured in a series of tomographic volumes by tracking the microstructural features. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4391 / 4403

页数：13

共 17 条

[1] EFFECT OF SUPEREUTETIC HOMOGENIZATION ON INCIDENCE OF POROSITY IN ALUMINUM ALLOY-2014 INGOT [J].

ANYALEBECHI, PN ;

HOGARTH, J .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 1994, 25 (01) :111-122

[2] Hydrogen in aluminum [J].

Birnbaum, HK ;

Buckley, C ;

Zeides, F ;

Sirois, E ;

Rozenak, P ;

Spooner, S ;

Lin, JS .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 253 :260-264

[3] Pore evolution in a direct chill cast Al-6 wt.% Mg alloy during hot rolling [J].

Chaijaruwanich, A. ;

Dashwood, R. J. ;

Lee, P. D. ;

Nagaumi, H. .

ACTA MATERIALIA, 2006, 54 (19) :5185-5194

[4] Observation of microstructure and damage in materials by phase sensitive radiography and tomography [J].

Cloetens, P ;

PateyronSalome, M ;

Buffiere, JY ;

Peix, G ;

Baruchel, J ;

Peyrin, F ;

Schlenker, M .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (09) :5878-5886

[5]

Itoh G., 2007, P 113 C JAP I LIGHT, P363

[6] Preferential penetration path of gallium into grain boundary in practical aluminium alloy [J].

Kobayashi, M. ;

Toda, H. ;

Uesugi, K. ;

Ohgaki, T. ;

Kobayashi, T. ;

Takayama, Y. ;

Ahn, B. -G. .

PHILOSOPHICAL MAGAZINE, 2006, 86 (28) :4351-4366

[7] High-density three-dimensional mapping of internal strain by tracking microstructural features [J].

Kobayashi, Masakazu ;

Toda, Hiroyuki ;

Kawai, Yuji ;

Ohgaki, Tomomi ;

Uesugi, Kentaro ;

Wilkinson, David S. ;

Kobayashi, Toshiro ;

Aoki, Yoshimitsu ;

Nakazawa, Mitsuru .

ACTA MATERIALIA, 2008, 56 (10) :2167-2181

[8]

Kubaschewski O, 1970, GASES METALS, P32

[9] DEEP TRAPPING STATES FOR HYDROGEN IN DEFORMED IRON [J].

KUMNICK, AJ ;

JOHNSON, HH .

ACTA METALLURGICA, 1980, 28 (01) :33-39

[10]

ODETTE JH, 1957, J MET, V9, P924

← 1 2 →