Effect of grain size on the uniform ductility of a bulk ultrafine-grained alloy

Jae Eun Jin; Yeon Seung Jung; Young Kook Lee

doi:10.1016/j.msea.2006.02.350

Effect of grain size on the uniform ductility of a bulk ultrafine-grained alloy

Jae Eun Jin, Yeon Seung Jung, Young Kook Lee

Department of Materials Science and Engineering

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

49 Citations (Scopus)

Abstract

A bulk metastable austenitic alloy with different ultrafine grain sizes (0.3, 0.6, and 2 μm) was fabricated by a repetitive thermomechanical process consisting of conventional cold rolling and annealing. The ultrafine-grained specimens showed not only high tensile strength (∼900 MPa) but also large elongation (∼40%) because of the strain hardening enhanced by the strain-induced martensitic transformation during tensile test. The uniform elongation of the ultrafine-grained specimens was divided into two different regions: the lower strain-hardened region (Region I) governed by dislocation plasticity in austenite, and the higher strain-hardened region (Region II) dominated by strain-induced martensitic transformation. The finer grain size, the wider the lower strain-hardened region the narrower the higher strain-hardened region and total uniform elongation of ultrafine-grained austenitic alloy.

Original language	English
Pages (from-to)	786-789
Number of pages	4
Journal	Materials Science and Engineering A
Volume	448-451
DOIs	https://doi.org/10.1016/j.msea.2006.02.350
Publication status	Published - 2007 Mar 25

Bibliographical note

Funding Information:
This work was financially supported by the Ministry of Commerce, Industry and Energy of Korea. The authors acknowledge the support.

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/j.msea.2006.02.350

Cite this

@article{163f7e051bdb4fab9bdb56f6bf474edd,

title = "Effect of grain size on the uniform ductility of a bulk ultrafine-grained alloy",

abstract = "A bulk metastable austenitic alloy with different ultrafine grain sizes (0.3, 0.6, and 2 μm) was fabricated by a repetitive thermomechanical process consisting of conventional cold rolling and annealing. The ultrafine-grained specimens showed not only high tensile strength (∼900 MPa) but also large elongation (∼40%) because of the strain hardening enhanced by the strain-induced martensitic transformation during tensile test. The uniform elongation of the ultrafine-grained specimens was divided into two different regions: the lower strain-hardened region (Region I) governed by dislocation plasticity in austenite, and the higher strain-hardened region (Region II) dominated by strain-induced martensitic transformation. The finer grain size, the wider the lower strain-hardened region the narrower the higher strain-hardened region and total uniform elongation of ultrafine-grained austenitic alloy.",

author = "Jin, {Jae Eun} and Jung, {Yeon Seung} and Lee, {Young Kook}",

note = "Funding Information: This work was financially supported by the Ministry of Commerce, Industry and Energy of Korea. The authors acknowledge the support. ",

year = "2007",

month = mar,

day = "25",

doi = "10.1016/j.msea.2006.02.350",

language = "English",

volume = "448-451",

pages = "786--789",

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

issn = "0921-5093",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Effect of grain size on the uniform ductility of a bulk ultrafine-grained alloy

AU - Jin, Jae Eun

AU - Jung, Yeon Seung

AU - Lee, Young Kook

N1 - Funding Information: This work was financially supported by the Ministry of Commerce, Industry and Energy of Korea. The authors acknowledge the support.

PY - 2007/3/25

Y1 - 2007/3/25

N2 - A bulk metastable austenitic alloy with different ultrafine grain sizes (0.3, 0.6, and 2 μm) was fabricated by a repetitive thermomechanical process consisting of conventional cold rolling and annealing. The ultrafine-grained specimens showed not only high tensile strength (∼900 MPa) but also large elongation (∼40%) because of the strain hardening enhanced by the strain-induced martensitic transformation during tensile test. The uniform elongation of the ultrafine-grained specimens was divided into two different regions: the lower strain-hardened region (Region I) governed by dislocation plasticity in austenite, and the higher strain-hardened region (Region II) dominated by strain-induced martensitic transformation. The finer grain size, the wider the lower strain-hardened region the narrower the higher strain-hardened region and total uniform elongation of ultrafine-grained austenitic alloy.

AB - A bulk metastable austenitic alloy with different ultrafine grain sizes (0.3, 0.6, and 2 μm) was fabricated by a repetitive thermomechanical process consisting of conventional cold rolling and annealing. The ultrafine-grained specimens showed not only high tensile strength (∼900 MPa) but also large elongation (∼40%) because of the strain hardening enhanced by the strain-induced martensitic transformation during tensile test. The uniform elongation of the ultrafine-grained specimens was divided into two different regions: the lower strain-hardened region (Region I) governed by dislocation plasticity in austenite, and the higher strain-hardened region (Region II) dominated by strain-induced martensitic transformation. The finer grain size, the wider the lower strain-hardened region the narrower the higher strain-hardened region and total uniform elongation of ultrafine-grained austenitic alloy.

UR - http://www.scopus.com/inward/record.url?scp=33847209873&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847209873&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2006.02.350

DO - 10.1016/j.msea.2006.02.350

M3 - Article

AN - SCOPUS:33847209873

VL - 448-451

SP - 786

EP - 789

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -

Effect of grain size on the uniform ductility of a bulk ultrafine-grained alloy

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this