Effect of dislocation density on the low temperature aging behavior of an ultra low carbon bake hardening steel

被引：64

作者：

De, AK

De Blauwe, K

Vandeputte, S

De Cooman, BC

机构：

[1] State Univ Ghent, Lab Iron & Steelmaking, B-9052 Ghent, Belgium

[2] OCAS NV, Res Ctr SIDMAR, Flat Rolled Prod Div, ARBED Grp, B-9060 Zelzate, Belgium

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 310卷

关键词：

ULC-steel(A); aging(D); dislocation(C); yield phenomena(D); ultrasonics(E); internal friction(E);

D O I：

10.1016/S0925-8388(00)00973-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Strain aging was studied in an ultra low carbon (ULC) steel with a total carbon content of 20 ppm (wt.%) in order to identify the process stages and mechanism of bake hardening in this type of steel. The effects of dislocation density, varied by means of uniaxial tensile prestraining (1-10%) on the aging kinetics were investigated within an aging temperature range of 50-170 degrees C. The aging was evaluated by means of strength measurements and the determination of interstitial carbon content after aging using a piezoelectric composite oscillator operating at 40 kHz, The interaction between interstitial carbon and dislocations was examined through amplitude dependent internal friction measurements. The influence of dislocation density on the aging behavior have been discussed with reference to the kinetics and mechanism of the aging process. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：405 / 410

页数：6

共 16 条

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