B0755 Titanium alloys at elevated temperature

323 Pages·2001·8.22 MB·English

by  M. R. Winstone

TITANIUM ALLOYS AT ELEVATED TEMPERATIJRE
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TITANIUM ALLOYS AT ELEVATED
TEMPERATURE: STRUCTURAL
DEVELOPMENT AND SERVICE
BEHAVIOUR
Edited by
M. R. Winstone
MICROSTRUCTURE OF mGH
TEMPERATURE MATERIALS
Number 4
Series Editor
A. Strang
Book 0755
First published in 2001 by
10M Communications Ltd
1 Carlton House Terrace
London SW1Y 5DB
10M Communications Ltd 2001
(Some individual papers Crown Copyright)
All rights reserved
10M Communications Ltd
is a wholly-owned Subsidiary of
The Institute of Materials
ISBN 1-86125-140-8
Typeset and printed in the UK by
Keyset Composition, Colchester
Printed and bound in the UK at
The University Press, Cambridge
Contents
Preface vi
SeriesEditor's Preface vii
Keynote Papers
Market Development - TheImplications for Research and Development 1
R. Thomas
Titanium Alloys in High Performance Automotive Engine Applications 9
M. Cope
Modelling Structural Development in the Manufacture of
Titanium Alloys 17
J. W. Brooks
Forging
Microstructural Characterisation and Modelling of Ti6Al4VAlloy
During Thermomechanical Processing in the bPhase Field 29
R. Ding, Z. X. Guo, W. Sha and A. Wilson
The Useof High Temperature X-Ray Diffractometry to Study Phase
Transformations in Ti-6AI-4V 41
R. Pederson, o. Babushkin, R. Warren and F. Skystedt
Influence of Strain Parameters on the Deformation Resistance
of Ti-6AI-4V Titanium Alloy at 1173-12 73K 51
K. Kubiak, W. Ziaja, M. Motyka and J. Sieniawski
Mechanical Properties of Closeddie Forgings of Ti-6AI-2Mo-2Cr
as a Function of Heat Treatment Parameters 59
K. Kubiak, W. Ziaja and M. Motyka
Differential Scanning Calorometry Study and Computer Modelling
of {3==? {3 Transformation in Ti-6AI-2Sn-4Zr-2Mo Alloy 69
S. Malinov, Z. Guo, W. Sha, Z. X. Guo and A. F. Wilson
Thermomechanical Processing of Tialloys: the application of a Novel
Technique to Examine Sub-{3Transus Isothermal Forging of
Ti-6AI-2Sn-4Zr-6Mo 89
M.Jackson, R.J. Dashwood, L.Christodoulou, H. M. Flower
v
vi CONTENTS
Non-Burning Alloys
Effect oj Pre-Heat-Treatment on Microstructure and Mechanical
Properties of Ti-25V-15Cr-2AI (wt%) Alloy 103
Y. G. Li,M. H. Loretto, D. Rugg and W. Voice
Effect ojX (Fe, Cr, Co, etc.) on the Morphology and Formation
of TiCin TiAlloys with Carbon Additions 113
Z. Q. Chen, Y. G. Liand M. H. Loretto
Oxidation Behaviour oj a New High Temperature Titanium
Alloy - Ti40 Bum Resistant Titanium Alloy 123
Y. Q. Zhao, L. Zhou, H. L.Qu, K. Y. Zhu and H.Wu
Fabrications
Welding of Ti-l OV-2Fe-3AI: a Comparison oj Techniques 133
I. C. Wallis and A. Wisbey
Residual Stresses,Texture and Microstructure in Electron
Beam Welds oj1M! 834 151
J.-R. Cho, S. M. Roberts, R. C. Reed and K. T. Conlon
TheMicrostructure and Superplastic Properties ojMechanically
Milled Ti-6AI-4V+ 0.5% Boron 165
T. M. Godfrey, A. Wisbey, A. Brown, R. Brydson and C. Hammond
Elevated Temperature Fatigue Crack Growth and Time Dependent
Behaviour in Ti-6246 177
J. P. Jones, M. R. Bache, W. J. Evans and S. Williams
Surface Engineering
Surface Engineering oj TiAlloysfor High Temperature Applications 187
J. R. Nicholls, M.J. Deakin and T. Rose
Surface and Substrate Stability oj Titanium Alloys Usedin Aerospace 219
C. D. Jones
Modification oj the Microstructure and Properties of Ti-1AI-1Mn
Titanium Alloy Due toNitriding and Oxynitriding under
GlowDischarge Conditions 229
J. R. Sobiecki, T. Wierzchon, T. Karpinski, J. Rudnicki
CONTENTS vii
Aluminides
Practical Advice on the Use of Ti-45AI-2-2-XD Gamma Titanium
Aluminide 237
w. Voice
Hot Plastic Flow and Workability Of1-TiAI Based Alloys 251
Y. Y. Cui, R.Yang and Z. X. Guo
Effect of Grain Refinement on Continuous Cooling Phase
Transformations in Some TiAI-Based Alloys 263
D.Hu
Deterioration of Mechanical Properties Caused by Omega Phase
in Major Alloyed TiAI-Based Alloys 277
Z. W. Huang, P. Bowen and W. Voice
Prediction of w Phase Formation in Ti-Al-X Alloys 291
G. Shao and P. Tsakiropoulos
Thermal Processing of an Orthorhombic (Ti2AINb) Based Alloy 301
P. M. Sarosi, A. Partridge and 1.P.Jones
Author Index 311
Subject Index 312

Preface
The commercial exploitation of titanium alloys has a short history, still less
than 50years. This period has seen a substantial expansion of titanium usage,
in terms of quantity and diversity of application. Although once considered to
be an exotic and expensive material, titanium is now used in many sectors of
industry and prospects for further market penetration are good. The successful
processing of titanium alloys into high performance components. that operate
at elevated temperature, high stress and in aggressive environments requires a
detailed understanding of the microstructure of titanium.
The High Temperature Materials Performance Committee of the Institute of
Materials has organised a series of conferences that concentrate on micro-
structural aspects of materials. This volume contains the papers presented
during a two-day conference focused on the evolution of the microstructure
in titanium alloys; the development of the optimum structure during
processing and the subsequent effects of elevated temperature service.
The papers include invited keynotes highlighting the benefits and
challenges of using titanium alloys in various market sectors, alongside
submitted technical papers that concentrated on microstructural evolution,
thermomechanical processing, advanced fabrication, process modelling, and
structural control in Ti intermetallics. The papers provide an insight into the
status of titanium metallurgy across the world since the conference was
attended by delegates from nine countries.
Iam indebted to the Organising Committee Members for their tireless efforts
in generating a programme of high technical quality, refereeing the papers
and creating an excellent environment for stimulating discussions.
Mike Winstone
Chairman, Organising Committee
Committee Members:
Prof. W. J. Evans Dr A. Partridge
Prof. H. M. Flower Dr D. Rugg
Prof. I. P.Jones Dr R.Thomas
Prof. J. R. Nicholls
ix