High-pressure torsion of hafnium

Kaveh Edalati, Zenji Horita, Yoji Mine

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Pure Hf (99.99%) is processed by high-pressure torsion (HPT) under pressures of 4 and 30 GPa to form an ultrafine-grained structure with a gain size of ∼180 nm. X-ray diffraction analysis shows that, unlike Ti and Zr, no ω phase formation is detected after HPT processing even under a pressure of 30 GPa. A hydride formation is detected after straining at the pressure of 4 GPa. The hydride phase decomposes either by application of a higher pressure as 30 GPa or by unloading for prolong time after HPT processing. Microhardness, tensile and bending tests show that a high hardness (360 Hv) and an appreciable ductility (8%) as well as high tensile and bending strength (1.15 and 2.75 GPa, respectively) are achieved following the high-pressure torsion.

Original languageEnglish
Pages (from-to)2136-2141
Number of pages6
JournalMaterials Science and Engineering A
Volume527
Issue number7-8
DOIs
Publication statusPublished - Mar 25 2010

Fingerprint

Hafnium
hafnium
Torsional stress
torsion
hydrides
Hydrides
flexural strength
unloading
tensile tests
ductility
microhardness
tensile strength
hardness
Bending tests
Processing
Unloading
Bending strength
Microhardness
X ray diffraction analysis
Ductility

All Science Journal Classification (ASJC) codes

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

Cite this

High-pressure torsion of hafnium. / Edalati, Kaveh; Horita, Zenji; Mine, Yoji.

In: Materials Science and Engineering A, Vol. 527, No. 7-8, 25.03.2010, p. 2136-2141.

Research output: Contribution to journalArticle

Edalati, Kaveh ; Horita, Zenji ; Mine, Yoji. / High-pressure torsion of hafnium. In: Materials Science and Engineering A. 2010 ; Vol. 527, No. 7-8. pp. 2136-2141.
@article{7ef18ef99ea94ba393fc76ed092f9c13,
title = "High-pressure torsion of hafnium",
abstract = "Pure Hf (99.99{\%}) is processed by high-pressure torsion (HPT) under pressures of 4 and 30 GPa to form an ultrafine-grained structure with a gain size of ∼180 nm. X-ray diffraction analysis shows that, unlike Ti and Zr, no ω phase formation is detected after HPT processing even under a pressure of 30 GPa. A hydride formation is detected after straining at the pressure of 4 GPa. The hydride phase decomposes either by application of a higher pressure as 30 GPa or by unloading for prolong time after HPT processing. Microhardness, tensile and bending tests show that a high hardness (360 Hv) and an appreciable ductility (8{\%}) as well as high tensile and bending strength (1.15 and 2.75 GPa, respectively) are achieved following the high-pressure torsion.",
author = "Kaveh Edalati and Zenji Horita and Yoji Mine",
year = "2010",
month = "3",
day = "25",
doi = "10.1016/j.msea.2009.11.060",
language = "English",
volume = "527",
pages = "2136--2141",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",
number = "7-8",

}

TY - JOUR

T1 - High-pressure torsion of hafnium

AU - Edalati, Kaveh

AU - Horita, Zenji

AU - Mine, Yoji

PY - 2010/3/25

Y1 - 2010/3/25

N2 - Pure Hf (99.99%) is processed by high-pressure torsion (HPT) under pressures of 4 and 30 GPa to form an ultrafine-grained structure with a gain size of ∼180 nm. X-ray diffraction analysis shows that, unlike Ti and Zr, no ω phase formation is detected after HPT processing even under a pressure of 30 GPa. A hydride formation is detected after straining at the pressure of 4 GPa. The hydride phase decomposes either by application of a higher pressure as 30 GPa or by unloading for prolong time after HPT processing. Microhardness, tensile and bending tests show that a high hardness (360 Hv) and an appreciable ductility (8%) as well as high tensile and bending strength (1.15 and 2.75 GPa, respectively) are achieved following the high-pressure torsion.

AB - Pure Hf (99.99%) is processed by high-pressure torsion (HPT) under pressures of 4 and 30 GPa to form an ultrafine-grained structure with a gain size of ∼180 nm. X-ray diffraction analysis shows that, unlike Ti and Zr, no ω phase formation is detected after HPT processing even under a pressure of 30 GPa. A hydride formation is detected after straining at the pressure of 4 GPa. The hydride phase decomposes either by application of a higher pressure as 30 GPa or by unloading for prolong time after HPT processing. Microhardness, tensile and bending tests show that a high hardness (360 Hv) and an appreciable ductility (8%) as well as high tensile and bending strength (1.15 and 2.75 GPa, respectively) are achieved following the high-pressure torsion.

UR - http://www.scopus.com/inward/record.url?scp=75849145008&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=75849145008&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2009.11.060

DO - 10.1016/j.msea.2009.11.060

M3 - Article

AN - SCOPUS:75849145008

VL - 527

SP - 2136

EP - 2141

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

IS - 7-8

ER -