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Production and processing of high quality PM materials
PM parts PRODUCTION OF ELECTRICALLY CONDUCTING COMPOSITE MATERIALS AND APPLICATION IN ELECTRIC MOTORS
L.A. Anistratenko et al, Poroshkovaya Metallurgiya, No 3, 1991, 9-11. (In Russian). The production of composite materials, by use of electric resistance welding of powder, is described. Use of these materials in the brush/collector parts of small electric machines is shown to increase service life by a factor of four to seven. PRODUCTION AND PROPERTIES OF POWDER THERMOBIMETALS BY EXTRUSION
S.G Agbalyan et al, Poroshkovaya Metallurgiya, No 3, 1991, 46-52. (In Russian). Extruded powder bimetals were studied w i t h r e s p e c t to p r o p e r t i e s i n c l u d i n g ¥oung's modulus, resistivity and behaviour under elevated temperature. Values higher t h a n for s t a n d a r d alloys are r e p o r t e d particularly specific bending. SELF-LUBRICATION METAL-POLYMER MATERIALS FOR USE IN ARTIFICIAL LIMB J O I N T S
I.I. Beloborodov et al, Poroshkovaya Metallurgiya, No 3, 1991, 83-85. (In Russian).
Reasons for the failure of artificial limb joints ar discussed and axe stated to be due mainly to the failure of bearing materials used in the rubbing surfaces. The use of m e t a l p o w d e r / p o l y m e r c o m p o s i t e s is shown, in laboratory tests, to increase service lives by a factor of three and to be noiseless in use.
Porous materials
Miscellaneous REVIEWS AND P R O S P E C T S FOR THE CHINESE PM INDUSTRY
H. Fenglin, (Beijin Powder Metallurgy Co, Beijing, China), PM Technology, Vol 9, No 2, 1991, 66-69, (In Chinese). The p a p e r p r e s e n t s an analysis of changes in the production of PM parts, in China, since 1980. Attention is drawn to problems still requiring solutions.
E F F I C I E N C Y OF CAPILLARY POROUS POWDER MATERIALS
V.I~ Shelag, Poroshkovaya Metallurgiya, No 3, 1991, 53-55. (In Russian). The characteristics required in capillary p o r o u s p o w d e r m a t e r i a l s are defined. Suggestions are made about parameters which may allow determination of the efficiency of these materials.
POROUS PERMEABLE STAINLESS STEEL FILTER MATERIALS
S.V. Belov et al, Poroshkovaya Metallurgiya, No 3, 1991, 59-64. (In Russian). Stainless steel filter materials, made from various stainless steel powders, were investigated with regard to structure and hydraulica and filtering properties. The results were examined statistically. Results from laboratory and industrial tests showed good consistency.
PRODUCTION AND PROCESSING OF HIGH QUALITY PM MATERIALS
W. Graf et al, (Krupp GmbH, Essen, Germany,) Powder Metall. Int., Vol 23, No 4, 1991, 246-252. The production of powder by atomization and the processing of the powder into parts by HIP followed by f o r g i n g a n d r o l l i n g o r by i n j e c t i o n m o u l d i n g is d e s c r i b e d w i t h s p e c i a l emphasis on quality control and assurance at all stages. MATERIALS RESEARCH AND ION E N G I N E E R I N G TECHNOLOGY
S. Hayakawa, J.Japan Soc, Powder and Powder Metallurgy, Vol 38, No 3, 1991, 399-402. (In Japanese). The paper reviews recent trends and developments in ion engineering technology and its application to materials engineering research.
1991 AMPI/MPIF Powder Metallurgy Conference The following abstracts are of papers presented at PM Aerospace and Speciality Materials Symposium which took place at the APMI/MPIF conference held in Chicago, Illinois, USA, 9-12 J u n e 1991.
NON-EQUILIBRIUM PROCESSING OF POWDER ALLOYS FOR AEROSPACE APPLICATIONS
C. Suryanaryana et al. (Univ of Idaho, USA). The roles of mechanical alloying (MA) a n d r a p i d s o l i d i f i c a t i o n (RS) in t h e production of materials with enhanced p e r f o r m a n c e , d u e to n o n - e q u i l i b r i u m c h a r a c t e r i s t i c s , w e r e reviewed. T h e s e processes were defined and the structural refinements they confer on materials were discussed. The applications of MA and RS to light alloys has facilitated the production of materials with high strength and good t e m p e r a t u r e stability and the resulting benefits gained were outlined.
REVIEW OF PM METAL MATRIX COMPOSITES
H.J. Rack, (Clemson Univ, USA). The use of PM t e c h n i q u e s in t h e production of MMC was outlined with
56 MPR November 1991
reference to the control of p r o p e r t i e s through the control of process conditions. I t w a s s h o w n t h a t t h e e f f e c t s of reinforcement on dynamic deformation and response to heat treatment provide a means for the development of materials with optimized properties.
CHEMICAL CONDITIONING OF RAPIDLY SOLIDIFIED ALUMINIUM ALLOY PARTICULATES
G.P. Staniek and K.Wefers. (ALCOA Laboratories, USA). Chemical treatment of aluminium alloy particulates, as an alternative to degassing prior to compacting, was described. The chemical treatment is used to modify the surface oxide/hydroxide layers. Powders were made by a variety of methods and after chemical treatment, by immersion in a treatment and the mechanical properties of the consolidated materials were measured. An improvement in fracture toughness was reported.
FABRICATION OF RAPIDLY SOLIDIFIED HIGH TEMPERATURE ALUMINIUM ALLOYS
P.S. Gilman et al. (Allied-Signal Inc., Morristown, New Jersey, USA). The fabrication of A1 alloys from RS powder was discussed with regard to the structure/property relationships of A1Fe-V-Si alloys. The alloys were shown to have a balance of high and low temperature properties. The effects of various fabrication sequences on microstructure and properties were described.
FATIGUE AND FRACTURE OF ADVANCED PM ALUMINUM ALLOYS
B. Weiss et al. (Univ of Vienaa, Austria). The o b j e c t i v e of t h e i n v e s t i g a t i o n described was the selection and processing of PM A1 alloys with good strength and fatigue properties at ambient and elevated temperatures. Rapid solidification a n d m e c h a n i c a l alloying
L.A. Anistratenko et al, Poroshkovaya Metallurgiya, No 3, 1991, 9-11. (In Russian). The production of composite materials, by use of electric resistance welding of powder, is described. Use of these materials in the brush/collector parts of small electric machines is shown to increase service life by a factor of four to seven. PRODUCTION AND PROPERTIES OF POWDER THERMOBIMETALS BY EXTRUSION
S.G Agbalyan et al, Poroshkovaya Metallurgiya, No 3, 1991, 46-52. (In Russian). Extruded powder bimetals were studied w i t h r e s p e c t to p r o p e r t i e s i n c l u d i n g ¥oung's modulus, resistivity and behaviour under elevated temperature. Values higher t h a n for s t a n d a r d alloys are r e p o r t e d particularly specific bending. SELF-LUBRICATION METAL-POLYMER MATERIALS FOR USE IN ARTIFICIAL LIMB J O I N T S
I.I. Beloborodov et al, Poroshkovaya Metallurgiya, No 3, 1991, 83-85. (In Russian).
Reasons for the failure of artificial limb joints ar discussed and axe stated to be due mainly to the failure of bearing materials used in the rubbing surfaces. The use of m e t a l p o w d e r / p o l y m e r c o m p o s i t e s is shown, in laboratory tests, to increase service lives by a factor of three and to be noiseless in use.
Porous materials
Miscellaneous REVIEWS AND P R O S P E C T S FOR THE CHINESE PM INDUSTRY
H. Fenglin, (Beijin Powder Metallurgy Co, Beijing, China), PM Technology, Vol 9, No 2, 1991, 66-69, (In Chinese). The p a p e r p r e s e n t s an analysis of changes in the production of PM parts, in China, since 1980. Attention is drawn to problems still requiring solutions.
E F F I C I E N C Y OF CAPILLARY POROUS POWDER MATERIALS
V.I~ Shelag, Poroshkovaya Metallurgiya, No 3, 1991, 53-55. (In Russian). The characteristics required in capillary p o r o u s p o w d e r m a t e r i a l s are defined. Suggestions are made about parameters which may allow determination of the efficiency of these materials.
POROUS PERMEABLE STAINLESS STEEL FILTER MATERIALS
S.V. Belov et al, Poroshkovaya Metallurgiya, No 3, 1991, 59-64. (In Russian). Stainless steel filter materials, made from various stainless steel powders, were investigated with regard to structure and hydraulica and filtering properties. The results were examined statistically. Results from laboratory and industrial tests showed good consistency.
PRODUCTION AND PROCESSING OF HIGH QUALITY PM MATERIALS
W. Graf et al, (Krupp GmbH, Essen, Germany,) Powder Metall. Int., Vol 23, No 4, 1991, 246-252. The production of powder by atomization and the processing of the powder into parts by HIP followed by f o r g i n g a n d r o l l i n g o r by i n j e c t i o n m o u l d i n g is d e s c r i b e d w i t h s p e c i a l emphasis on quality control and assurance at all stages. MATERIALS RESEARCH AND ION E N G I N E E R I N G TECHNOLOGY
S. Hayakawa, J.Japan Soc, Powder and Powder Metallurgy, Vol 38, No 3, 1991, 399-402. (In Japanese). The paper reviews recent trends and developments in ion engineering technology and its application to materials engineering research.
1991 AMPI/MPIF Powder Metallurgy Conference The following abstracts are of papers presented at PM Aerospace and Speciality Materials Symposium which took place at the APMI/MPIF conference held in Chicago, Illinois, USA, 9-12 J u n e 1991.
NON-EQUILIBRIUM PROCESSING OF POWDER ALLOYS FOR AEROSPACE APPLICATIONS
C. Suryanaryana et al. (Univ of Idaho, USA). The roles of mechanical alloying (MA) a n d r a p i d s o l i d i f i c a t i o n (RS) in t h e production of materials with enhanced p e r f o r m a n c e , d u e to n o n - e q u i l i b r i u m c h a r a c t e r i s t i c s , w e r e reviewed. T h e s e processes were defined and the structural refinements they confer on materials were discussed. The applications of MA and RS to light alloys has facilitated the production of materials with high strength and good t e m p e r a t u r e stability and the resulting benefits gained were outlined.
REVIEW OF PM METAL MATRIX COMPOSITES
H.J. Rack, (Clemson Univ, USA). The use of PM t e c h n i q u e s in t h e production of MMC was outlined with
56 MPR November 1991
reference to the control of p r o p e r t i e s through the control of process conditions. I t w a s s h o w n t h a t t h e e f f e c t s of reinforcement on dynamic deformation and response to heat treatment provide a means for the development of materials with optimized properties.
CHEMICAL CONDITIONING OF RAPIDLY SOLIDIFIED ALUMINIUM ALLOY PARTICULATES
G.P. Staniek and K.Wefers. (ALCOA Laboratories, USA). Chemical treatment of aluminium alloy particulates, as an alternative to degassing prior to compacting, was described. The chemical treatment is used to modify the surface oxide/hydroxide layers. Powders were made by a variety of methods and after chemical treatment, by immersion in a treatment and the mechanical properties of the consolidated materials were measured. An improvement in fracture toughness was reported.
FABRICATION OF RAPIDLY SOLIDIFIED HIGH TEMPERATURE ALUMINIUM ALLOYS
P.S. Gilman et al. (Allied-Signal Inc., Morristown, New Jersey, USA). The fabrication of A1 alloys from RS powder was discussed with regard to the structure/property relationships of A1Fe-V-Si alloys. The alloys were shown to have a balance of high and low temperature properties. The effects of various fabrication sequences on microstructure and properties were described.
FATIGUE AND FRACTURE OF ADVANCED PM ALUMINUM ALLOYS
B. Weiss et al. (Univ of Vienaa, Austria). The o b j e c t i v e of t h e i n v e s t i g a t i o n described was the selection and processing of PM A1 alloys with good strength and fatigue properties at ambient and elevated temperatures. Rapid solidification a n d m e c h a n i c a l alloying