Determination of creep behaviour of Ti60 alloy by small punch creep test

作者：Liu, Hui^*; Lin, Wenjie; Dou, Jiarui

来源：Materials at High Temperatures, 2017, 34(3): 166-171.

DOI：10.1080/09603409.2016.1255166

• Small punch test
• Ti alloy
• creep
• activation energy

The small punch (SP) creep test has distinct advantages in the creep property assessment of materials at elevated temperatures. However, there are few creep properties of Ti alloys obtained by the SP creep test in the current literature. In this paper, the SP creep behaviour of Ti60 alloy has been evaluated under various loads in the range 550-800N over a temperature range 873-973K. The SP creep curves obviously indicated the primary, secondary and tertiary stages of creep. The test results have been compared with those of conventional creep tests. The European Code of Practice (CoP) for Small Punch Testing, Dorn equation and Monkman-Grant relationship have also been used to analyse the results of the SP creep tests. The ratio of load of the SP creep tests to equivalent stress of conventional creep tests, the load exponent value of steady deflection rate and activation energy for creep deformation were estimated from the SP creep tests. In conclusion, it was found that dislocation creep may be the main mechanism that dominates the SP creep deformation of Ti60 alloy in the range of load and temperature.

• 出版日期2017
• 单位上海师范大学