In this study, the critical values of damage were determined for 100Cr6 grade steel specimens subjected to forming in the temperature range of 950–1150 °C. This was done using 8 phenomenological criteria of failure and 3 calibration tests based on uniaxial tension, torsion and rotary compression. Experiments were performed on test stands installed at the Czestochowa University of Technology and the Lublin University of Technology. The above calibration tests were modelled numerically using the commercial simulation software Simufact. Forming v. 15. The average values of temperature, strain rate and critical damage were calculated for every calibration test. Results showed a significant relationship between critical damage and forming temperature. A comparison was made between the critical damage values obtained in the torsion and tensile tests, performed at similar temperatures and strain rates. It has been found that the relationship between the critical damage values determined via torsion and uniaxial tensile testing is fairly stable for the dimensionless fracture criteria, i.e. those formulated by Oh, Oyane and Brozzo.

在这项研究中，对 100Cr6 级钢试样在 950-1150 °C 的温度范围内进行成形确定了损伤的临界值。这是使用 8 项故障现象学标准和 3 项基于单轴拉伸、扭转和旋转压缩的校准测试完成的。实验在安装在琴斯托霍瓦理工大学和卢布林理工大学的测试台上进行。上述校准测试使用商业仿真软件 Simufact 进行数值模拟。Forming v. 15. 计算每个校准测试的温度、应变率和临界损伤的平均值。结果表明临界损伤与成形温度之间存在显着关系。对在扭转和拉伸试验中获得的临界损伤值进行了比较，在相似的温度和应变率下进行。已经发现，对于无量纲断裂标准，即由 Oh、Oyane 和 Brozzo 制定的标准，通过扭转和单轴拉伸试验确定的临界损伤值之间的关系是相当稳定的。