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Effects of zirconium and vanadium on mechanical properties of aluminium-titanium
stainless steel was described. It was shown that AlzOs did not react with the matrix, CraCe reacted strongly giving thick films of brittle reaction product and Tic reacted only slightly. The bond strength between Tic and the matrix was high making Tic the most effective reinforcement.
Aluminium
Alloys
ANALYSIS OF SURFACE OXIDE FILMS ON TERNARY ALUMINIUM SILICON ALLOYS J.L. Estrada, J. Duszcyk (Delft University of Technology, Delft, The Netherlands) An investigation of the composition and thickness of surface films on air and Ar atomized ternary Al-BO%Si alloys was described. The ternary additions were Cu, Mg, Fe or Ni. Ar atomized powders had thinner oxide films, lower density and the powders were of lower surface area. Alloy composition affected the composition of films but thickness was determined by atomizing atmosphere. MECIIANICAL ALLOYING APPLIED TO ALUMINIUM-TITANIUM-BERYLIUM ALLOY F. Ravel et al (CEA, Bryeres de Chatel, France) Potential applications for Al-T-Be alloys were discussed with reference to properties.
It was reported that mechanical alloying had been used to prepare binary and ternary alloy powders which were characterized by electron microscopy and X-ray analysis. Amorphization and nanocrystallization were shown to occur during MA. A mathematical model of MA was outlined. MECHANICAL PROPERTIES OF RAPIDLY SOLIDIFIED ALUMINIUMTITANIUM-IRON-CHROMIUM ALLOYS
properties of Al-8%Ti-S.l%Zr were superior to those of AI-8XTi. The relationship between the enhanced properties microstructure were discussed.
Steel EFFECT OF ACCELERATING AND INHIBITING ADDITIONS ON SINTERIN’G OF CARBON STEELS
T. Matsumoto et al (Tohoku University, Sendai, Japan). It was reported that Al-Ti-Fe-Cr alloys, fabricated by extrusion from gas atomized powders had higher strength than Young’s modulus than conventional PM alloys. This was attributed to fine scale microstructure, grain size and dispersion of inter-metallic phases.
S.M. Metchkova et al (MK Ltd, Sofia, Bulgaria) It was reported that elements of group II of the periodic table accelerated decomposition of CO in contact with Fe and the elements of groups V, Vl and VII, inhibited decomposition. These findings were related to the carburization of Fe during sintering and to the pressure of accelerating or inhibiting additives. Influence on pearlite was also established.
EFFECTS OF ZIRCONIUM AND VANADIUM ON MECHANICAL PROPERTIES OF ALUMINIUMTITANIUM
A MODEL FOR IRON-CARBONPHOSPHORUS POWDER ALLOYS
I.H. Mood et al (Hanyang University, Seoul, Korea) It was noted that the addition of V or Zr to Al-Ti alloys stabilized TiAls disperosids formed during mechanical alloying. It was reported that the high temperature
V.G. Ljulko et al (Don State Technical University, Rostow-on Don, Russia) Studies of Fe-(0.5 to 2.5)%P- (0.5 to 2.5)%C powders and sintered compacts were described. A computerized model to describe properties in relationship to impurity levels was given.
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For further details and quotations contact: Kirsty Whareham Elsevier Advanced Technology PO 80x 150, Kidlington, Oxford, OX5 lAS, UK Tel: g865 843000; Fax: 0865 843973
ELSEVIER ADVANCED TM3HNOLOUY
MPR January 1995 47
Aluminium
Alloys
ANALYSIS OF SURFACE OXIDE FILMS ON TERNARY ALUMINIUM SILICON ALLOYS J.L. Estrada, J. Duszcyk (Delft University of Technology, Delft, The Netherlands) An investigation of the composition and thickness of surface films on air and Ar atomized ternary Al-BO%Si alloys was described. The ternary additions were Cu, Mg, Fe or Ni. Ar atomized powders had thinner oxide films, lower density and the powders were of lower surface area. Alloy composition affected the composition of films but thickness was determined by atomizing atmosphere. MECIIANICAL ALLOYING APPLIED TO ALUMINIUM-TITANIUM-BERYLIUM ALLOY F. Ravel et al (CEA, Bryeres de Chatel, France) Potential applications for Al-T-Be alloys were discussed with reference to properties.
It was reported that mechanical alloying had been used to prepare binary and ternary alloy powders which were characterized by electron microscopy and X-ray analysis. Amorphization and nanocrystallization were shown to occur during MA. A mathematical model of MA was outlined. MECHANICAL PROPERTIES OF RAPIDLY SOLIDIFIED ALUMINIUMTITANIUM-IRON-CHROMIUM ALLOYS
properties of Al-8%Ti-S.l%Zr were superior to those of AI-8XTi. The relationship between the enhanced properties microstructure were discussed.
Steel EFFECT OF ACCELERATING AND INHIBITING ADDITIONS ON SINTERIN’G OF CARBON STEELS
T. Matsumoto et al (Tohoku University, Sendai, Japan). It was reported that Al-Ti-Fe-Cr alloys, fabricated by extrusion from gas atomized powders had higher strength than Young’s modulus than conventional PM alloys. This was attributed to fine scale microstructure, grain size and dispersion of inter-metallic phases.
S.M. Metchkova et al (MK Ltd, Sofia, Bulgaria) It was reported that elements of group II of the periodic table accelerated decomposition of CO in contact with Fe and the elements of groups V, Vl and VII, inhibited decomposition. These findings were related to the carburization of Fe during sintering and to the pressure of accelerating or inhibiting additives. Influence on pearlite was also established.
EFFECTS OF ZIRCONIUM AND VANADIUM ON MECHANICAL PROPERTIES OF ALUMINIUMTITANIUM
A MODEL FOR IRON-CARBONPHOSPHORUS POWDER ALLOYS
I.H. Mood et al (Hanyang University, Seoul, Korea) It was noted that the addition of V or Zr to Al-Ti alloys stabilized TiAls disperosids formed during mechanical alloying. It was reported that the high temperature
V.G. Ljulko et al (Don State Technical University, Rostow-on Don, Russia) Studies of Fe-(0.5 to 2.5)%P- (0.5 to 2.5)%C powders and sintered compacts were described. A computerized model to describe properties in relationship to impurity levels was given.
Promote your company and save money by having replrints of an article or whole page advertisement that appears in this issue
For further details and quotations contact: Kirsty Whareham Elsevier Advanced Technology PO 80x 150, Kidlington, Oxford, OX5 lAS, UK Tel: g865 843000; Fax: 0865 843973
ELSEVIER ADVANCED TM3HNOLOUY
MPR January 1995 47