Electric heat treatment process for aluminum and titanium aluminum vanadium alloy

Gorecki, T. A.

English

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https://ntrs.nasa.gov/search.jsp?R=19670017005 2020-03-12T11:23:49+00:00Z



















I I , I  
I 
4-2 
FIGURE IV-2 
Heat the Specimens. The D. C. Generator is a 3OKW, 100 Ampere, 300 Volt Power 
Close-up View of the Power Supply System Which Will Be Used To 
Supply Photo No, 4590 
4-3 
~~~~~ 

I 
i 
I 
I- 
FIGURE N-3 This Photograph Shows the Heat Treat Area of the System Which 
Includes the Control Panel, Heat Treat Tank, Ventilation Hood, and Sink 
4- 5 Photo No. 4588 
FIGURE IV-4 Close-up View of the Control Panel 
Fabricated to Control Heat  Treating Operation 
Photo No. 4591 
4-6 


FIGURE IV-5 Close-up View of the Heat Treating Tank and Circulation System. 
Note the sample visible through the Plexiglas window. Photo No. 4589 
4- 9 
FIGURE IV-6 Close-up View of a Suspended Sample through the T'ank W m h ~ .  
Photograph also shows specimen support fixture. Photo No. 4587 
4- 10 


































Figure V-14. Temperature-Voltage trace of heating Run No. 024. 
Ti-6A1-4V - 5/32" thick i n  8% solution of K(C2H302) 
Figure V- 15. Temperature-Voltage trace of heating Run NO. 047 
Ti-6A1-4V i n  8% K(C2H302) - 5/32" thick. 
5-34 

Figure V- 16. Photomicrograph showing 
the general structure of specimen of 
Ti-6A1-4V solution treated conventionally 
in a furnace at 1730°F for 30 minutes with 
water quench. 
MAG: lOOX Etch-Krolls 
Figure V- 17. Photomicrograph showing 
the gneral structure of a Ti-6A1-4V 
specimen electrolytically solution treated 
at 1730°F for 48 seconds followed by a 
solution quench. 
MAG: lOOX Etch- Krolls 
Figure V- 18. Photomicrograph showing 
general structure Ti-6A1-4V specimen 
electrolytically solution treated for 8 1 
seconds and quenched. Specimen was 
heated above the beta tronics before 
quenching . 
MAG : lOOX Etch - Krolls 
5-36 
MAG: lOOX Figure V- 19 Etch: Kellers 
General structure of a 2219 A1 specimen, 
conventionally solution treated at 1000°F 
for 45 minutes and water quenched. 
MAG: Figure V-20 Etch: Kellers 
General structure of a 2219 A1 specimen 
electrolytically solution treated at  100°F 
for 30 seconds and quenched. 
~ ' 
MAG: lOOX Figure V-21 Etch: Kellers 
General structure of a 2219 A1 specimen 
electrolytically solution treated at  1000°F 
for 45 seconds and quenched. 
MAG: lOOX Figure V-22 Etch: Kellers 
General structure of a 2219 A1 specimen 
electrolytically solution treated at 1000°F 
for 60 seconds and quenched. 
5-37 













L 
,039 
I + *  
Specimen 
Envelope 
L t 
Figure V-27. Side View of a Ti-6Al-4V Specimen Approaching Red Heat 
Note the arcing condition around the edge of the specimen. The black area 
outsie the a rc  is the specimen envelope. 
Measurements in the sketch are taken from photograph. Magnification of 
photo is 3.2X 
5-5 1 
c 
0 .507 .014 
.04 
.021 
+ 4  
.O I8 
Figure V-28. Front View of Another Ti-6A1-4V Specimen Near Red Heat at 
4.5 Magnification. Note the extended envelope at the two corners. 
5-52 

5-54 









Figure VI-2. Edge of Ti-6A1-4V speci- 
men heated to 1750°F electrolytically for 
2 minutes and quenched. Note the small 
breaks in edge of the specimen. 
MAG:75X Etch: None 
cracks on the Ti-6Ai-4V specimen shown 
in Figure VI-2. Crack depth is about 
.0008". 
MAG:5 OOX Etch: None 
6- 7 
the contamination and edge cracks on an 
electrolytically solution treated specimen 
of Ti-6A1-4V. Contamination and crack 
depth are about 0.0010". 
MAG:5 OOX Etch: Krolls 




a, 
Figure VI-5. This photomicrograph shows 
the edge of a 2219 A1 specimen heated to 
1025°F and quenched. Note the incipient 
melting along the edge of the specimen. 
MAG:75X Etch: None 
Figure VI-6. Enlarged view of the edge 
of the specimen shown in Figure VI-5. 
MAG: 500X Etch: None 
Figure VI-7. General microstruction of 
a specimen heated to 995°F electrolytically 
and quenched. 
MAG: 250X Etch: Kellers 
6- 12 








Research on electric heating of metals for thermal treatment Final report

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