The effect of hydrogen release at room temperature on the ductility of steel wire rods for pre-stressed concrete

被引：30

作者：

Carneiro Filho, C. J. ^{[2
]}

Mansur, M. B. ^{[1
]}

Modenesi, P. J. ^{[1
]}

Gonzalez, B. M. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Met & Mat Engn, Belo Horizonte, MG, Brazil

[2] Gerdau Acominas, Ouro Branco, MG, Brazil

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 18-19期

关键词：

Hydrogen release; High-carbon steel; Trap-controlled diffusion; THERMAL-DESORPTION; PURE IRON;

D O I：

10.1016/j.msea.2010.04.042

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present study investigated the variation of reduction in area at fracture with the storage time of a high-carbon steel wire rod for pre-stressed concrete. The steel used in this study was an 11-mm diameter, hot-rolled and controlled-cooled wire rod produced without vacuum degassing. The wire hydrogen content and its reduction in area were measured for storage times up to 960 hat room temperature. The hydrogen content decreased from 1.85 ppm immediately after cooling to nearly 0.55-0.60 ppm after 216 h and then stabilized, while the reduction in area increased from 20% to around 37% during this same period of time. Analysis of the hydrogen content variation over time suggests that the release of hydrogen is responsible for an increase in the ductility of the steel. It was also shown, by comparing the results from two models regarding the amount of hydrogen release from the wire, that this phenomenon may be controlled by diffusion when reversible traps are present. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：4947 / 4952

页数：6

共 22 条

[1] ABNT NBR ISO 6892, 2002, 6892 ABNT NBR ISO
[2] Crank J., 1979, MATH DIFFUSION, V2nd
[3] Modeling of hydrogen thermal desorption profile of pure iron and eutectoid steel
Ebihara, Ken-ichi
Suzudo, Tomoaki
Kaburaki, Hideo
Takai, Kenichi
Takebayashi, Shigeto
[J]. ISIJ INTERNATIONAL, 2007, 47 (08) : 1131 - 1140
[4] Modeling thermal desorption analysis of hydrogen in steel
Enomoto, Masato
Hirakami, Daisuke
Tarui, Toshimi
[J]. ISIJ INTERNATIONAL, 2006, 46 (09) : 1381 - 1387
[5] 1980 INSTITUTE OF METALS LECTURE THE METALLURGICAL-SOCIETY-OF-AIME - EFFECTS OF HYDROGEN ON THE PROPERTIES OF IRON AND STEEL
HIRTH, JP
[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1980, 11 (06): : 861 - 890
[6] THE INTERACTION OF HYDROGEN AND THE CEMENTITE FERRITE INTERFACE IN CARBON-STEEL
HONG, GW
LEE, JY
[J]. JOURNAL OF MATERIALS SCIENCE, 1983, 18 (01) : 271 - 277
[7] HYDROGEN IN IRON
JOHNSON, HH
[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1988, 19 (10): : 2371 - 2387
[8] Influence of initial conditions on trap-controlled hydrogen diffusion with calculations of effective diffusion coefficients
Kasuya, T
Hashiba, Y
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1999, 32 (20) : 2674 - 2682
[9] KAWABE N, 1999, WIRE J INT, V32, P82
[10] KIM YS, 2001, J R D, V15, P318

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