Abstract
The specimen heating during displacement-controlled and load-controlled tensile test was measured on high manganese steel. Direct observation of deformation behaviors and heat conduction at the specimen surface in liquid helium was also performed. The results are summarized as follows:
1) The deformation behaviors obtained in high manganese steel are similar to those obtained in austenitic stainless steels.
2) Inspite of large discontinuous deformation in load-controlled test, the magnitude of temperature rise during the deformation is not so different from that observed in displacement-controlled test.
3) It is clarified that the change of condition of helium and heat conductance at the specimen surface cause the abrupt and large deformation in load-controlled tensile test.
