Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging

N.G. Jones, R.J. Dashwood, D. Dye, M. Jackson

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

2 Citations (Scopus)

Abstract

Ti-5Al-5Mo-5V-3Cr(Ti-5-5-5-3)has become the alloy of choice for large scale high strength forgings in the aerospace industry, for example the truck beam in landing gear assemblies. The current processing route for these components requires multiple hot forging steps, which influence the in service properties of the material. Recently, significant effort has been made to characterise and understand the behaviour of Ti-5-5-5-3 during isothermal forging to enable the through process prediction of both microstructural evolution and mechanical properties. This paper evaluates the flow behaviour in relation to process temperature, strain rate, initial microstructural condition and the influence of lubrication. Macroscopic grain flow and strain distribution within the workpiece were influenced by the friction factor generated by the application of different lubricants, however the shape and magnitude of the mean flow stress appeared to be unaffected. Temperature and strain rate alter the magnitude of mean flow stress, whilst the shape of the curve was found to be directly related to the high temperature microstructure. The morphology and size of the alpha phase precipitates were found to have a substantial influence on the peak strength and the extent of flow softening, whilst steady state flow was dominated by dynamic recovery of the beta phase. These observations are found to be consistent with other high strength meta-stable beta alloys such as Ti-10V-2Fe-3Al.
Original languageEnglish
Title of host publicationTi-2011, proceedings of the 12th World Conference on Titanium
EditorsLian Zhou, Hui Chang, Yafeng Lu
PublisherScience Press
Pages226-230
Number of pages5
Volume1
ISBN (Print)9787030338990, 9787030338952, 9787030338945
Publication statusPublished - 2012
EventWorld Conference on Titanium - Beijing, China
Duration: 19 Jun 201124 Jun 2011
Conference number: 12

Conference

ConferenceWorld Conference on Titanium
Abbreviated titleTi-2011
CountryChina
CityBeijing
Period19/06/1124/06/11

Fingerprint

Forging
Plastic flow
Strain rate
Forgings
Aerospace industry
Microstructural evolution
Temperature
Trucks
Lubrication
Lubricants
Precipitates
Friction
Recovery
Mechanical properties
Microstructure
Processing

Keywords

  • Flow softening
  • Metastable beta alloys
  • Thermomechanical processing (TMP
  • Ti-5Al-5Mo-5V-3Cr (Ti-5-5-5-3)

Cite this

Jones, N. G., Dashwood, R. J., Dye, D., & Jackson, M. (2012). Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging. In L. Zhou, H. Chang, & Y. Lu (Eds.), Ti-2011, proceedings of the 12th World Conference on Titanium (Vol. 1, pp. 226-230). Science Press.

Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging. / Jones, N.G.; Dashwood, R.J.; Dye, D.; Jackson, M.

Ti-2011, proceedings of the 12th World Conference on Titanium. ed. / Lian Zhou; Hui Chang; Yafeng Lu. Vol. 1 Science Press, 2012. p. 226-230.

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

Jones, NG, Dashwood, RJ, Dye, D & Jackson, M 2012, Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging. in L Zhou, H Chang & Y Lu (eds), Ti-2011, proceedings of the 12th World Conference on Titanium. vol. 1, Science Press, pp. 226-230, World Conference on Titanium, Beijing, China, 19/06/11.
Jones NG, Dashwood RJ, Dye D, Jackson M. Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging. In Zhou L, Chang H, Lu Y, editors, Ti-2011, proceedings of the 12th World Conference on Titanium. Vol. 1. Science Press. 2012. p. 226-230
Jones, N.G. ; Dashwood, R.J. ; Dye, D. ; Jackson, M. / Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging. Ti-2011, proceedings of the 12th World Conference on Titanium. editor / Lian Zhou ; Hui Chang ; Yafeng Lu. Vol. 1 Science Press, 2012. pp. 226-230
@inproceedings{91ffef62c7c2498a9b280856071555e8,
title = "Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging",
abstract = "Ti-5Al-5Mo-5V-3Cr(Ti-5-5-5-3)has become the alloy of choice for large scale high strength forgings in the aerospace industry, for example the truck beam in landing gear assemblies. The current processing route for these components requires multiple hot forging steps, which influence the in service properties of the material. Recently, significant effort has been made to characterise and understand the behaviour of Ti-5-5-5-3 during isothermal forging to enable the through process prediction of both microstructural evolution and mechanical properties. This paper evaluates the flow behaviour in relation to process temperature, strain rate, initial microstructural condition and the influence of lubrication. Macroscopic grain flow and strain distribution within the workpiece were influenced by the friction factor generated by the application of different lubricants, however the shape and magnitude of the mean flow stress appeared to be unaffected. Temperature and strain rate alter the magnitude of mean flow stress, whilst the shape of the curve was found to be directly related to the high temperature microstructure. The morphology and size of the alpha phase precipitates were found to have a substantial influence on the peak strength and the extent of flow softening, whilst steady state flow was dominated by dynamic recovery of the beta phase. These observations are found to be consistent with other high strength meta-stable beta alloys such as Ti-10V-2Fe-3Al.",
keywords = "Flow softening, Metastable beta alloys, Thermomechanical processing (TMP, Ti-5Al-5Mo-5V-3Cr (Ti-5-5-5-3)",
author = "N.G. Jones and R.J. Dashwood and D. Dye and M. Jackson",
year = "2012",
language = "English",
isbn = "9787030338990",
volume = "1",
pages = "226--230",
editor = "Lian Zhou and Hui Chang and Yafeng Lu",
booktitle = "Ti-2011, proceedings of the 12th World Conference on Titanium",
publisher = "Science Press",
address = "China",

}

TY - GEN

T1 - Understanding the behaviour of Ti-5Al-5Mo-5V-3Cr during subtransus isothermal forging

AU - Jones, N.G.

AU - Dashwood, R.J.

AU - Dye, D.

AU - Jackson, M.

PY - 2012

Y1 - 2012

N2 - Ti-5Al-5Mo-5V-3Cr(Ti-5-5-5-3)has become the alloy of choice for large scale high strength forgings in the aerospace industry, for example the truck beam in landing gear assemblies. The current processing route for these components requires multiple hot forging steps, which influence the in service properties of the material. Recently, significant effort has been made to characterise and understand the behaviour of Ti-5-5-5-3 during isothermal forging to enable the through process prediction of both microstructural evolution and mechanical properties. This paper evaluates the flow behaviour in relation to process temperature, strain rate, initial microstructural condition and the influence of lubrication. Macroscopic grain flow and strain distribution within the workpiece were influenced by the friction factor generated by the application of different lubricants, however the shape and magnitude of the mean flow stress appeared to be unaffected. Temperature and strain rate alter the magnitude of mean flow stress, whilst the shape of the curve was found to be directly related to the high temperature microstructure. The morphology and size of the alpha phase precipitates were found to have a substantial influence on the peak strength and the extent of flow softening, whilst steady state flow was dominated by dynamic recovery of the beta phase. These observations are found to be consistent with other high strength meta-stable beta alloys such as Ti-10V-2Fe-3Al.

AB - Ti-5Al-5Mo-5V-3Cr(Ti-5-5-5-3)has become the alloy of choice for large scale high strength forgings in the aerospace industry, for example the truck beam in landing gear assemblies. The current processing route for these components requires multiple hot forging steps, which influence the in service properties of the material. Recently, significant effort has been made to characterise and understand the behaviour of Ti-5-5-5-3 during isothermal forging to enable the through process prediction of both microstructural evolution and mechanical properties. This paper evaluates the flow behaviour in relation to process temperature, strain rate, initial microstructural condition and the influence of lubrication. Macroscopic grain flow and strain distribution within the workpiece were influenced by the friction factor generated by the application of different lubricants, however the shape and magnitude of the mean flow stress appeared to be unaffected. Temperature and strain rate alter the magnitude of mean flow stress, whilst the shape of the curve was found to be directly related to the high temperature microstructure. The morphology and size of the alpha phase precipitates were found to have a substantial influence on the peak strength and the extent of flow softening, whilst steady state flow was dominated by dynamic recovery of the beta phase. These observations are found to be consistent with other high strength meta-stable beta alloys such as Ti-10V-2Fe-3Al.

KW - Flow softening

KW - Metastable beta alloys

KW - Thermomechanical processing (TMP

KW - Ti-5Al-5Mo-5V-3Cr (Ti-5-5-5-3)

M3 - Conference proceeding

SN - 9787030338990

SN - 9787030338952

SN - 9787030338945

VL - 1

SP - 226

EP - 230

BT - Ti-2011, proceedings of the 12th World Conference on Titanium

A2 - Zhou, Lian

A2 - Chang, Hui

A2 - Lu, Yafeng

PB - Science Press

ER -