抄録
In the present paper is presneted a report of an electronic type high temperature tensile testing machine which we have been enabled to design, and which is capable of automatically controlling strain rate of the test specimen between its gage marks. The capacity of the machine is 10000kg, with the following capabilities.
(1) Driving System of Servo-Mechanism utilizing Silicon Controlled Rectifier with high response.
(2) Automatic Strain Rate Control ranging from 0.05 to 20%/min.
(3) Strain Rate Control Accuracy within ±0.5%/min. of set speed.
(4) Duplex Type Heating System for increasing efficiency.
In view of the fact that ISO, BS and JIS require that the strain rate between the gage marks will be maintained constant during the high temperature test, the conventional testing machines are hardly adequate for the purpose of performing the test so as to meet the requirement. With this machine the test can be made as designated by these standards with high accuracy automatically, and moreover, it is better fit for studying the effect of the strain rate on the high-temperature properties of metals.
