Gamma Titanium Aluminide Alloys: Science and Technology

This first book entirely dedicated to titanium aluminide alloys emphasizes the relation between basic research topics and processing technologies for real applications. As such, it covers complex microstructures down to the nanometer scale, titanium aluminide structure/property relationships and the potential in such key industries as aerospace, automotive and power conversion. The result is more detailed coverage of the fundamentals than is otherwise found in typical textbooks, making this relevant reading not only for the Ti–Al research community, but also for a wide range of physical metallurgists, product developers and industrial companies needing advanced, lightweight metallic components.

Spis treści:
INTRODUCTION
CONSTITUTION
Phase equilibria in the Ti–Al system
Stable phases in multi–component alloys
Important ternary phase diagrams
PHYSICAL PROPERTIES
Elastic and thermo–physical properties
Point defects
Diffusion
PHASE TRANSFORMATIONS AND MICROSTRUCTURES
Microstructure formation on solidification
Directional solidification
solid state phase transformations
DEFORMATION BEHAVIOUR
Kinematics of deformation
Dislocation dynamics
Hardening mechanisms
Work hardening and work softening
YIELD STRESS AND DUCTILITY
Global effects of constitution and microstructure
Brittle and ductile behaviour
Statistical assessment
CREEP
General behaviour
Effects of constitution and microstructure
Mechanistic understanding
General assessment
FRACTURE
Cleavage fracture
Toughening mechanisms
Fracture toughness
Statistical assessment
FATIGUE
General behaviour
Fatigue crack growth
Effects of constituion and microstructure
Effects of temperature
OXIDATION RESISTANCE
General properties (Al, Nb, Cr, TiAl–Ag)
Halogen (Cl) effect
Embrittlement
Coatings
ALLOY DESIGN
Effect of aluminium content
Influence of impo rtant alloying elements
Process specific alloy development
INGOT PRODUCTION AND CASTING
Ingot production
Cast components
POWDER METALLURGY
Elemental powder route
Pre–allyed powder route
Mechanical alloying
WROUGHT PROCESSING
Conversion of microstructure
Primary ingot break–down
Texture evolution
Secondary processing
Novel techniques
JOINING
Diffusion bonding
Welding and soldering
SURFACE HARDENING
Shot peening
Roller burnishing
Residual stresses, microhardness and surface roughness
Thermal stability of surface hardening
APPLICATIONS AND COMPONENT ASSESSMENT

Nota biograficzna:
Fritz Appel is group leader for physical metallurgy at the GKSS Research Centre in Geesthacht, Germany. He obtained his Ph.D. in 1973 from the Institute of Solid State Physics of the Academy of Sciences in Halle, GDR. He spent six months in Japan on a JSPS fellowship in 1987 and joined the Institute of Materials Research in Geesthacht in 1990, where he became group leader in 1993.
He received the Research Prize of the Soviet and German Academies of Sciences in 1979, the Tammann Award from the German Society for Materials Science in 1999 and the Charles Hatchett Award from the London Institute of Materials in 2002. He has published over 160 papers, given 80 invited lectures and holds three patents in the field.
Jonathan D. H. Paul is member of the Institute of Materials Research in Geesthacht, which he joined in 1999. He obtained his Ph.D. from Manchester University, UK, in 1990, followed by postdoctoral research there, then stayed at the Nuclear Energy Commissariat in Gif–sur–Yvette, France, from 1993 to 1994. He spent two years at GKSS as research fellow before working at the Structural Materials Centre in Farnborough, UK, from 1997 to 1999.
He received the Vanadium Award in 1995 and the Charles Hatchett Award in 2002, both from the London Institute of Materials.
Michael O ehring is currently active in the physical metallurgy group of the Institute of Materials Research of GKSS in Geesthacht. He received his Ph.D. from the Institute of Metal Physics of Göttingen University, Germany, in 1988, where he stayed on for field ion microscopy research until 1989. He then joined the applied physical metallurgy group of GKSS, where he remained until 1993.
He received the Charles Hatchett Award in 2002 from the London Institute of Materials and has published nearly 90 papers as well as coauthored thre patents.