Skip to Main Content
Skip Nav Destination
ASTM Selected Technical Papers
Compression Testing of Homogeneous Materials and Composites
By
R Chait
R Chait
1
Army Materials and Research Mechanics Center
,
Watertown, Mass. 02172
;
symposium co-chairman and co-editor
.
Search for other works by this author on:
R Papirno
R Papirno
2
Army Materials and Research Mechanics Center
,
Watertown, MA, symposium chairman and editor
Search for other works by this author on:
ISBN-10:
0-8031-0248-8
ISBN:
978-0-8031-0248-4
No. of Pages:
302
Publisher:
ASTM International
Publication date:
1983

Axisymmetric upsetting of cylindrical billets under isothermal and nonisothermal conditions is investigated. For isothermal cases, OFHC (oxygen-free high-conducting) copper at room temperature and titanium alloy Ti-6242 at elevated temperatures are considered. Modified stress distribution functions for a semi-empirical model of upset forging are presented. From this model, information on load-displacement and the development of deformation inhomogeneities are obtained that compare favorably with the experimental data.

For nonisothermal cases, analysis for one-dimensional, non-steady-state heat conduction is incorporated into the semiempirical model. The effect of die-chilling on dead-zone formation and the development of inhomogeneities is investigated. It is found that material and process parameters related to the heat transfer characteristic of the system (billet, dies, and the lubricant films, in this case), as well as the temperature sensitivity of the billet material, have pronounced effects in this respect.

1.
Needleman
,
A.
,
Journal of Solids Structure
, Vol.
9
,
1973
, pp. 981-998.
2.
Lee
,
C. H.
and
Kobayashi
,
S.
,
Transactions of the American Society of Mechanical Engineers, Journal of Engineering for Industry
, Vol.
95
,
1973
, pp. 865-873.
3.
Hartley
,
P.
,
Sturgess
,
C. E. N.
, and
Rowe
,
G. W.
,
International Journal of Mechanical Sciences
, Vol.
22
,
1980
, pp. 743-753.
4.
Dadras
,
P.
,
Transactions of the American Society of Mechanical Engineers, Journal of Engineering for Industry
, Vol.
103
,
1981
, pp. 478-483.
5.
Rebelo
,
N.
and
Kobayashi
,
S.
,
International Journal of Mechanical Sciences
, Vol.
22
,
1980
, p. 699.
6.
Boer
,
C. R.
,
Schröder
,
G.
, and
Burgdorf
,
M.
,
Annals of the College Internationale de Recherche de Production
, Vol.
30
,
1981
, pp. 153-157.
7.
Dadras
,
P.
and
Thomas
,
J. F.
, Jr.
,
Metallurgical Transactions A
, Vol.
12A
,
1981
, pp. 1867-1876.
8.
Klafs
,
U.
, “
Ein Beitrag zur Bestimmung der Temperaturverteilung im Werkzeug und Werkstück beim Warmumformen
” (Determination of Temperature Distribution in Tools and Workpieces in Hot Working), Dipl.-Ing. dissertation,
University of Hanover
, West Germany,
1969
.
9.
Kellow
,
M. A.
,
Bramley
,
A. N.
, and
Bannister
,
F. K.
,
International Journal of Machine Tool Design and Research
, Vol.
9
,
1969
, pp. 239-269.
10.
Keung
,
W. C.
,
Dean
,
T. A.
, and
Jesch
,
L. F.
,
Proceedings
,
Third North American Metal-working Research Conference
,
Society of Manufacturing Engineers
,
Pittsburgh, Pa.
,
1975
, pp. 72-84.
11.
Schey
,
J. A.
and
Wallace
,
P. W.
,
Research Report
,
Illinois Institute of Technology Research Institute
, Chicago, Part II.
12.
Rooks
,
B. W.
,
Singh
,
A. K.
, and
Tobias
,
S. A.
,
Metals Technology
, Vol.
1
,
1974
, pp. 449-455.
13.
Sekhar
,
J. A.
,
Abbaschian
,
G. J.
, and
Mehrabian
,
R.
,
Material Science and Engineering
, Vol.
40
,
1979
, pp. 105-110.
14.
Wray
,
P. J.
,
Metallurgical Transactions A
, Vol.
13A
,
1982
, pp. 125-134.
15.
Dadras
,
P.
and
Thomas
,
J. F.
, Jr.
,
Res Mechanica Letters
, Vol.
1
,
1981
, pp. 97-103.
16.
Semiatin
,
S. L.
and
Lahoti
,
G. D.
,
Metallurgical Transactions A
, Vol.
12A
,
1981
, pp. 1705-1717.
This content is only available via PDF.
You do not currently have access to this chapter.
Close Modal

or Create an Account

Close Modal
Close Modal