Fracture toughness evaluation using Palmqvist crack models on AISI 1045 borided steels

被引：50

作者：

Campos, I. ^{[1
]}

Rosas, R. ^{[2
]}

Figueroa, U. ^{[3
]}

Velazquez, C. Villa ^{[1
]}

Meneses, A. ^{[1
]}

Guevara, A. ^{[4
]}

机构：

[1] Inst Politecn Nacl, SEPI ESIME UP Adolfo Lopez Mateos, Mexico City 07738, DF, Mexico

[2] Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico

[3] Carretera Lago Guadalupe, Tecnol Monterrey Campus Estados Mexico, Mexico City 52926, DF, Mexico

[4] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 488卷 / 1-2期

关键词：

paste boriding; boride layers; fracture toughness; palmqvist cracks; microindentation tests;

D O I：

10.1016/j.msea.2007.11.082

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present study evaluates the fracture toughness on Fe(2)B borided layers. Formation of the layers was obtained by means of the paste boriding process on an AISI 1045 steel surface. The treatment was carried out at temperatures of 1123, 1171 1223 and 1273 K for 8 h using a 4 mm thickness layer of boron carbide paste over the material surface. A Vickers microhardness tester was used to generate microcracks under loads of 1.9. 2.9. 4.9 and 9.8 N at different indentation distances across the thickness of the iron boride layer. The applied loads and the crack lengths generated from the corners, of the indentations were set as the experimental parameters, Using two Palmqvist cracks models, for the evaluation of the fracture toughness. Finally. the fracture toughness results in the borided layers were analyzed based on the different distances from the surface, microindentation loads and the treatment temperatures of the paste boriding process. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：562 / 568

页数：7

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