Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction

Peng Luo, Daniel T McDonald, Su-Ming Zhu, Suresh Palanisamy, Matthew Simon Dargusch, Kenong Xia

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Equal channel angular pressing (ECAP) was used to realise solid-state recycling of pure titanium machining chips. Fully dense bulk Ti with ultrafine grain sizes was obtained after ECAP at 450 °C although the grains were coarser at the higher consolidation temperature of 590 °C. The yield strength of the recycled Ti obeys the Hall–Petch relationship and reaches 650 MPa after consolidation at 450 °C for two passes. The strengths achieved are comparable to those observed in other Ti produced by ingot metallurgy with similar grain sizes. Analyses show that the strengthening is primarily due to grain size refinement rather than oxide dispersion, and low angle grain boundaries make significant contributions especially at the lower processing temperature.
Original languageEnglish
Pages (from-to)252 - 258
Number of pages7
JournalMaterials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume538
DOIs
Publication statusPublished - 2012

Cite this

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title = "Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction",
abstract = "Equal channel angular pressing (ECAP) was used to realise solid-state recycling of pure titanium machining chips. Fully dense bulk Ti with ultrafine grain sizes was obtained after ECAP at 450 °C although the grains were coarser at the higher consolidation temperature of 590 °C. The yield strength of the recycled Ti obeys the Hall–Petch relationship and reaches 650 MPa after consolidation at 450 °C for two passes. The strengths achieved are comparable to those observed in other Ti produced by ingot metallurgy with similar grain sizes. Analyses show that the strengthening is primarily due to grain size refinement rather than oxide dispersion, and low angle grain boundaries make significant contributions especially at the lower processing temperature.",
author = "Peng Luo and McDonald, {Daniel T} and Su-Ming Zhu and Suresh Palanisamy and Dargusch, {Matthew Simon} and Kenong Xia",
year = "2012",
doi = "10.1016/j.msea.2012.01.039",
language = "English",
volume = "538",
pages = "252 -- 258",
journal = "Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier",

}

Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction. / Luo, Peng; McDonald, Daniel T; Zhu, Su-Ming; Palanisamy, Suresh; Dargusch, Matthew Simon; Xia, Kenong.

In: Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 538, 2012, p. 252 - 258.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Analysis of microstructure and strengthening in pure titanium recycled from machining chips by equal channel angular pressing using electron backscatter diffraction

AU - Luo, Peng

AU - McDonald, Daniel T

AU - Zhu, Su-Ming

AU - Palanisamy, Suresh

AU - Dargusch, Matthew Simon

AU - Xia, Kenong

PY - 2012

Y1 - 2012

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AB - Equal channel angular pressing (ECAP) was used to realise solid-state recycling of pure titanium machining chips. Fully dense bulk Ti with ultrafine grain sizes was obtained after ECAP at 450 °C although the grains were coarser at the higher consolidation temperature of 590 °C. The yield strength of the recycled Ti obeys the Hall–Petch relationship and reaches 650 MPa after consolidation at 450 °C for two passes. The strengths achieved are comparable to those observed in other Ti produced by ingot metallurgy with similar grain sizes. Analyses show that the strengthening is primarily due to grain size refinement rather than oxide dispersion, and low angle grain boundaries make significant contributions especially at the lower processing temperature.

UR - http://dx.doi.org/10.1016/j.msea.2012.01.039

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DO - 10.1016/j.msea.2012.01.039

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EP - 258

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

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

SN - 0921-5093

ER -