Microstructure and Microhardness Evolution in Pure Molybdenum Processed by High-Pressure Torsion

Authors: Wang, X., Li, P., Huang, Y., Gao, N. and Langdon, T.G.

Journal: Advanced Engineering Materials

Volume: 22

Issue: 4

eISSN: 1527-2648

ISSN: 1438-1656

DOI: 10.1002/adem.201901022

Abstract:

Molybdenum, a refractory metal with a body-centered cubic lattice, is processed by high-pressure torsion (HPT) at room temperature under an applied pressure of 6.0 GPa and torsional straining from one-half to ten turns. The microstructures are characterized by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM), and measurements are taken of the Vickers microhardness. The results show a gradual evolution of homogeneity in grain size and microhardness with increasing numbers of HPT turns with an average grain size of ≈690 nm at the sample edge after five turns and a saturation microhardness of ≈660 Hv. The grain size after ten turns shows a slight decrease at the center, and the microhardness is slightly lower than after five turns due to the occurrence of limited dynamic recovery.

https://eprints.bournemouth.ac.uk/33021/

Source: Scopus

Microstructure and Microhardness Evolution in Pure Molybdenum Processed by High-Pressure Torsion

Authors: Wang, X., Li, P., Huang, Y., Gao, N. and Langdon, T.G.

Journal: ADVANCED ENGINEERING MATERIALS

Volume: 22

Issue: 4

eISSN: 1527-2648

ISSN: 1438-1656

DOI: 10.1002/adem.201901022

https://eprints.bournemouth.ac.uk/33021/

Source: Web of Science (Lite)

Microstructure and microhardness evolution in pure molybdenum processed by high-pressure torsion

Authors: Wang, X., Li, P., Huang, Y., Gao, N. and Langdon, T.G.

Journal: Advanced Engineering Materials

Volume: 22

Issue: 4

Pages: 1901022(1)-1901022(7)

Publisher: Wiley-Blackwell

ISSN: 1438-1656

DOI: 10.1002/adem.201901022

Abstract:

Molybdenum, a refractory metal with a body-centred cubic lattice, was processed by high-pressure torsion (HPT) at room temperature under an applied pressure of 6.0 GPa and torsional straining from 1/2 to 10 turns. The microstructures were characterized by electron back-scatter diffraction (EBSD) and transmission electron microscopy (TEM) and measurements were taken of the Vickers microhardness. The results show a gradual evolution of homogeneity in grain size and microhardness with increasing numbers of HPT turns with an average grain size of ~690 nm at the sample edge after 5 turns and a saturation microhardness of ~660 Hv. The grain size after 10 turns showed a slight decrease at the centre and the microhardness was slightly lower than after 5 turns due to the occurrence of limited dynamic recovery.

https://eprints.bournemouth.ac.uk/33021/

Source: Manual

Preferred by: Yi Huang

Microstructure and microhardness evolution in pure molybdenum processed by high-pressure torsion

Authors: Wang, X., Li, P., Huang, Y., Gao, N. and Langdon, T.G.

Journal: Advanced Engineering Materials

Volume: 22

Issue: 4

ISSN: 1438-1656

Abstract:

Molybdenum, a refractory metal with a body-centred cubic lattice, was processed by high-pressure torsion (HPT) at room temperature under an applied pressure of 6.0 GPa and torsional straining from 1/2 to 10 turns. The microstructures were characterized by electron back-scatter diffraction (EBSD) and transmission electron microscopy (TEM) and measurements were taken of the Vickers microhardness. The results show a gradual evolution of homogeneity in grain size and microhardness with increasing numbers of HPT turns with an average grain size of ~690 nm at the sample edge after 5 turns and a saturation microhardness of ~660 Hv. The grain size after 10 turns showed a slight decrease at the centre and the microhardness was slightly lower than after 5 turns due to the occurrence of limited dynamic recovery.

https://eprints.bournemouth.ac.uk/33021/

Source: BURO EPrints