On the determining role of microstructure of niobium-microalloyed steels with differences in impact toughness

被引：19

作者：

Anumolua, R. ^{[1
,2
]}

Kumar, B. Ravi ^{[2
]}

Misra, R. D. K. ^{[1
,2
]}

Mannering, T. ^{[3
]}

Panda, D. ^{[3
]}

Jansto, S. G. ^{[4
]}

机构：

[1] Univ Louisiana Lafayette, Dept Chem Engn, Lafayette, LA 70504 USA

[2] Univ Louisiana Lafayette, Ctr Struct & Funct Mat, Lafayette, LA 70504 USA

[3] Nucor Yamato Steel, Blytheville, AR 72316 USA

[4] Reference Metals, Bridgeville, PA 15017 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 491卷 / 1-2期

关键词：

microalloyed steels; impact toughness; microstructure;

D O I：

10.1016/j.msea.2008.01.008

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The relationship between microstructure and impact toughness was investigated for niobium-microalloyed steels with similar yield strength. The nominal steel composition was similar and any variation in processing history was unintentional. The general microstructure of the investigated steel was similar and consisted of 85% polygonal ferrite and 15% pearlite. Despite these similarities, they exhibited variation in toughness and were classified as high- and low-toughness steels. Detailed microstructural investigation including stereological analysis and electron microscopy implied that toughness is strongly influenced by mean intercept length of polygonal ferrite and pearlite colony, and their distribution, interlamellar spacing, and degenerated pearlite. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：55 / 61

页数：7

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