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Atomic and ionic impact phenomenon on metal surfaces
Classified
abstracts
1198. Impact (USA)
properties
1198-1211 of air and vacuum melted AISI-4340
37 steel.
Several commercial heats of air and vacuum melted AN-4340 steel were investigated to determine their mechanical properties. Data were derived from Charpy impact tests and tensile tests. The effect of decreasing phosphorus and sulphur content is correlated with changes in impact energy at 100 per cent fibrous structure, mechanical anisotropy and tensile properties. G E Gazza and F R Larson, Army Materials Research Agetry>, Watertown,
Mass,
USA, Sept 1965, 24 pages. 37
1199. What you can expect from vacuum diecasting.
(USA)
Previous studies have indicated use of vacuum should improve surface finish, soundness, mechanical properties and techniques in die casting. Description of work done in these areas at DoehlerJarvis Division, National Lead Co., Toledo, Ohio, to determine which vacuum process is best suited and most economical for their production. G F Hodgson, Foundry, 93, 1965, 104-108. 31 1200. The melting of metals in vacuum equipment and electric furnaces. (Spain)
A review, covering also factors to be considered in the auxiliary equipment such as pumps for obtaining various vacuums required. Various electric furnaces are considered. The application of vacuum techniques to the following metals are described briefly: Cu, Ti, Zr, MO, V, W, and Cr-Ni alloys. G Zuliani, Rev Met, 1 (4), 1965, 332-345, (in Spanish). 1201. Weight (Germany)
loss
of brass
condenser
tubes
in vacuum
31 annealing.
46. Glass blowing, sealing techniques
glass-to-metal
and ceramic-to-metal
46 1207. Nine-pin presses using direct glass-to-me&l seals. (USA) Since the oxide bond of usual glass-to-metal seals deteriorate when exposed to alkali-metal vapours at high temperatures, direct glass-to-metal seals have been developed for use in vacuum tubes containing alkali vapours. The report describes the techniques used to construct such seals. The metals used were tungsten, molybdenum, Kovar, chromallized molybdenum and Kovar and chromium plated molybdenum. The glasses were Corning 7740, 1720, 3320, 1720, 7052 and 1056. The report describes the cleaning techniques of the wires (0.040 in. diameter) the beading techniques of the wires, and the manufacturing technique of nine-pin presses. AR A Dolenga, Rep GMR-510, Nov 1965, General Motors Carp, Warren, Mich).
47. Outgassing data, residual analysis
(Research
data, vapour pressure data, gettering gases in vacuum systems, residual gas
Studying the kinetics of gas liberation liquid iron. See abstract number 1203.
49. Miscellaneous
materials
41 :3J in the vacuum treatment of
and techniques 49
1208. Materials J B Rittenhouse 56-63.
for space stations. and J B Singletary,
Metal Progress,
89 (2), Feb 1966, 49
The alloys tested include (JO/30) brass, Al-bronze (J6/22/2) and Admiralty alloy without As(J0/22/2) and with As (70/29/l). The tubes which in operation show intercrystalline corrosion, show a high weight loss after vacuum annealing, and this can be attributed to an increase in the effective evaporating surface. D Whitwham ef al, Metall, 19 (II), 1965, 1182, (in German),
1209. Machining difficult materials-molybdenum alloys. M Field et al, Metal Progress, 89 (2), Feb 1966, 84-89.
37 1202. The determination of the effect of degassing in vacuum on the (Poland) content of inclusions in steel.
1211. A new high-strength stainless steel suitable (USA) Anon, Cr>,og Technol, 1 (6), 1965, 261-264.
It is concluded that the vacuum degassed steel had less non-metallic inclusions by a factor of 2-4 times as the same steel which was not degassed. T Mazanek
et al, Hutnik,
32 (9), 1965, 309-315,
(it1 Polish).
31 : 47 1203. Studying Lhe kinetics of gas liberation in the vacuum treatment of liquid iron. (USSR) V T Burtsev et al, Zav Lab, 31 (I), 1965, 80-83, (in Russian). 37 1204. A guide to engineering castings. J A Vaccari, Mater Des Engng, 63 (3), March 1966, 83-98. 37 1205. Stanford’s two-mile waveguide-retort furnace anneals and brazes 266,000 components. A L Eldredge, Metal Progress, 89 (3), March 1966, 117-122. 37 1206. Gas generation during vacuum heating of silicon steel. (USSR)
In designing vacuum electric furnaces for heat treatments, it is necessary to know the amount of gases escaping from the metals. The amount of gases liberated from transformer steel was studied as a function of temperature (850-l 150”) and time (5-30 min) of heating. The data obtained can be used in calculating the capacity of vacuum pumps and vacuum systems of electric furnaces. V E Kochnov, (in Russian).
Elektrotermiya,
IV. Materials technology 41. Metals
Nauchn-Tekhn
and techniques
and alloys
Sb,
45, 1965, 49-50,
used in vacuum
41 : 16 Atomic and ionic impact phenomenon on metal surfaces. See abstract number 1130.
410
Laboratories,
1210. Operation of dc machines in high vacuum. (USSR) M L Dridzo, Electrotekhnica, 36 (7), 1965, 1.5-18, (in Russian). for cryogenic
49
49 use.
abstracts
1198. Impact (USA)
properties
1198-1211 of air and vacuum melted AISI-4340
37 steel.
Several commercial heats of air and vacuum melted AN-4340 steel were investigated to determine their mechanical properties. Data were derived from Charpy impact tests and tensile tests. The effect of decreasing phosphorus and sulphur content is correlated with changes in impact energy at 100 per cent fibrous structure, mechanical anisotropy and tensile properties. G E Gazza and F R Larson, Army Materials Research Agetry>, Watertown,
Mass,
USA, Sept 1965, 24 pages. 37
1199. What you can expect from vacuum diecasting.
(USA)
Previous studies have indicated use of vacuum should improve surface finish, soundness, mechanical properties and techniques in die casting. Description of work done in these areas at DoehlerJarvis Division, National Lead Co., Toledo, Ohio, to determine which vacuum process is best suited and most economical for their production. G F Hodgson, Foundry, 93, 1965, 104-108. 31 1200. The melting of metals in vacuum equipment and electric furnaces. (Spain)
A review, covering also factors to be considered in the auxiliary equipment such as pumps for obtaining various vacuums required. Various electric furnaces are considered. The application of vacuum techniques to the following metals are described briefly: Cu, Ti, Zr, MO, V, W, and Cr-Ni alloys. G Zuliani, Rev Met, 1 (4), 1965, 332-345, (in Spanish). 1201. Weight (Germany)
loss
of brass
condenser
tubes
in vacuum
31 annealing.
46. Glass blowing, sealing techniques
glass-to-metal
and ceramic-to-metal
46 1207. Nine-pin presses using direct glass-to-me&l seals. (USA) Since the oxide bond of usual glass-to-metal seals deteriorate when exposed to alkali-metal vapours at high temperatures, direct glass-to-metal seals have been developed for use in vacuum tubes containing alkali vapours. The report describes the techniques used to construct such seals. The metals used were tungsten, molybdenum, Kovar, chromallized molybdenum and Kovar and chromium plated molybdenum. The glasses were Corning 7740, 1720, 3320, 1720, 7052 and 1056. The report describes the cleaning techniques of the wires (0.040 in. diameter) the beading techniques of the wires, and the manufacturing technique of nine-pin presses. AR A Dolenga, Rep GMR-510, Nov 1965, General Motors Carp, Warren, Mich).
47. Outgassing data, residual analysis
(Research
data, vapour pressure data, gettering gases in vacuum systems, residual gas
Studying the kinetics of gas liberation liquid iron. See abstract number 1203.
49. Miscellaneous
materials
41 :3J in the vacuum treatment of
and techniques 49
1208. Materials J B Rittenhouse 56-63.
for space stations. and J B Singletary,
Metal Progress,
89 (2), Feb 1966, 49
The alloys tested include (JO/30) brass, Al-bronze (J6/22/2) and Admiralty alloy without As(J0/22/2) and with As (70/29/l). The tubes which in operation show intercrystalline corrosion, show a high weight loss after vacuum annealing, and this can be attributed to an increase in the effective evaporating surface. D Whitwham ef al, Metall, 19 (II), 1965, 1182, (in German),
1209. Machining difficult materials-molybdenum alloys. M Field et al, Metal Progress, 89 (2), Feb 1966, 84-89.
37 1202. The determination of the effect of degassing in vacuum on the (Poland) content of inclusions in steel.
1211. A new high-strength stainless steel suitable (USA) Anon, Cr>,og Technol, 1 (6), 1965, 261-264.
It is concluded that the vacuum degassed steel had less non-metallic inclusions by a factor of 2-4 times as the same steel which was not degassed. T Mazanek
et al, Hutnik,
32 (9), 1965, 309-315,
(it1 Polish).
31 : 47 1203. Studying Lhe kinetics of gas liberation in the vacuum treatment of liquid iron. (USSR) V T Burtsev et al, Zav Lab, 31 (I), 1965, 80-83, (in Russian). 37 1204. A guide to engineering castings. J A Vaccari, Mater Des Engng, 63 (3), March 1966, 83-98. 37 1205. Stanford’s two-mile waveguide-retort furnace anneals and brazes 266,000 components. A L Eldredge, Metal Progress, 89 (3), March 1966, 117-122. 37 1206. Gas generation during vacuum heating of silicon steel. (USSR)
In designing vacuum electric furnaces for heat treatments, it is necessary to know the amount of gases escaping from the metals. The amount of gases liberated from transformer steel was studied as a function of temperature (850-l 150”) and time (5-30 min) of heating. The data obtained can be used in calculating the capacity of vacuum pumps and vacuum systems of electric furnaces. V E Kochnov, (in Russian).
Elektrotermiya,
IV. Materials technology 41. Metals
Nauchn-Tekhn
and techniques
and alloys
Sb,
45, 1965, 49-50,
used in vacuum
41 : 16 Atomic and ionic impact phenomenon on metal surfaces. See abstract number 1130.
410
Laboratories,
1210. Operation of dc machines in high vacuum. (USSR) M L Dridzo, Electrotekhnica, 36 (7), 1965, 1.5-18, (in Russian). for cryogenic
49
49 use.