Effect of Strain Rate Upon Plastic Flow of Steel

Journal of Applied Physics - Tập 15 Số 1 - Trang 22-32 - 1944
Clarence Zener1, J. H. Hollomon1
1Research Division, Watertown Arsenal Laboratory, Watertown, Massachusetts

Tóm tắt

An experiment has been designed to check a previously proposed equivalence of the effects of changes in strain rate and in temperature upon the stress-strain relation in metals. It is found that this equivalence is valid for the typical steels investigated. The behavior of these steels at very high rates of deformation may, therefore, be obtained by tests at moderate rates of deformation performed at low temperatures. The results of such tests are described. Aside from changing the isothermal stress-strain relation, an increase of strain rate tends to change the conditions from isothermal to adiabatic. It is found that at low temperatures, the adiabatic stress-strain relation in the plastic range is radically different from the isothermal, having an initial negative rather than a positive slope. This initial negative slope renders unstable homogeneous plastic deformation.

Từ khóa


Tài liệu tham khảo

1937, Trans. A.I.M.E., 124, 208

1940, Trans. A.S.M., 28, 380

1932, Physik. Zeits., 33, 247

1933, Tech. Rep. Tohoku Imp. Univ., 11, 16

1936, 12, 63

1934, Proc. Roy. Soc., 143, 307

Thông tin
Thông tin xuất bản

Journal of Applied Physics

Tập 15 Số 1

22-32

Thông tin tác giả