Boron effects on the ductility of a nano-cluster-strengthened ferritic steel

Z. W. Zhang; C. T. Liu; S. Guo; J. L. Cheng; G. Chen; Takeshi Fujita; M. W. Chen; Yip Wah Chung; Semyon Vaynman; Morris E. Fine; Bryan A. Chin

doi:10.1016/j.msea.2010.10.058

Boron effects on the ductility of a nano-cluster-strengthened ferritic steel

Z. W. Zhang, C. T. Liu, S. Guo, J. L. Cheng, G. Chen, Takeshi Fujita, M. W. Chen, Yip Wah Chung, Semyon Vaynman, Morris E. Fine, Bryan A. Chin

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 °C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil.

Original language	English
Pages (from-to)	855-859
Number of pages	5
Journal	Materials Science and Engineering A
Volume	528
Issue number	3
DOIs	https://doi.org/10.1016/j.msea.2010.10.058
Publication status	Published - 2011 Jan 25

Keywords

Boron doping
Ductility
Ferritic steel
Moisture-induced embrittlement
Nano-cluster

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2010.10.058

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title = "Boron effects on the ductility of a nano-cluster-strengthened ferritic steel",

abstract = "The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 °C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil.",

keywords = "Boron doping, Ductility, Ferritic steel, Moisture-induced embrittlement, Nano-cluster",

author = "Zhang, {Z. W.} and Liu, {C. T.} and S. Guo and Cheng, {J. L.} and G. Chen and Takeshi Fujita and Chen, {M. W.} and Chung, {Yip Wah} and Semyon Vaynman and Fine, {Morris E.} and Chin, {Bryan A.}",

note = "Funding Information: This research was supported mainly by internal funding from Auburn University and Hong Kong polytechnic University , together with the Science and Technology Development Foundation of Nanjing University of Science and Technology of China ( XKF09055 ), the National Natural Sciences Foundation of China (No. 50871054 ), the Research Fund for the Doctoral Program of Higher Education of China ( 20093219110035 ), and the US National Science Foundation ( CMMI-0826535 ).",

year = "2011",

month = jan,

day = "25",

doi = "10.1016/j.msea.2010.10.058",

language = "English",

volume = "528",

pages = "855--859",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

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T1 - Boron effects on the ductility of a nano-cluster-strengthened ferritic steel

AU - Zhang, Z. W.

AU - Liu, C. T.

AU - Guo, S.

AU - Cheng, J. L.

AU - Chen, G.

AU - Fujita, Takeshi

AU - Chen, M. W.

AU - Chung, Yip Wah

AU - Vaynman, Semyon

AU - Fine, Morris E.

AU - Chin, Bryan A.

N1 - Funding Information: This research was supported mainly by internal funding from Auburn University and Hong Kong polytechnic University , together with the Science and Technology Development Foundation of Nanjing University of Science and Technology of China ( XKF09055 ), the National Natural Sciences Foundation of China (No. 50871054 ), the Research Fund for the Doctoral Program of Higher Education of China ( 20093219110035 ), and the US National Science Foundation ( CMMI-0826535 ).

PY - 2011/1/25

Y1 - 2011/1/25

N2 - The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 °C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil.

AB - The mechanical properties of Cu-rich nano-cluster-strengthened ferritic steels with and without boron doping were investigated. Tensile tests at room temperature in air showed that the B-doped ferritic steel has similar yield strength but a larger elongation than that without boron doping after extended aging at 500 °C. There are three mechanisms affecting the ductility and fracture of these steels: brittle cleavage fracture, week grain boundaries, and moisture-induced hydrogen embrittlement. Our study reveals that boron strengthens the grain boundary and suppresses the intergranular fracture. Furthermore, the moisture-induced embrittlement can be alleviated by surface coating with vacuum oil.

KW - Boron doping

KW - Ductility

KW - Ferritic steel

KW - Moisture-induced embrittlement

KW - Nano-cluster

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Boron effects on the ductility of a nano-cluster-strengthened ferritic steel

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Keywords

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