Low cycle fatigue - strain control test data for IN 718 material at 550 °C (fourth repeat test)

In May 1985 a European programme on intercomparison of low cycle fatigue (LCF) testing was started under the auspices of the EEC Community Bureau of Reference (BCR). Subsequently, as a result of the Versailles Project on Advanced Materials and Standards (VAMAS), a wider international participation was sought. The objective of the programme was to establish a set of high temperature LCF data representative of accepted testing practice and, subsequently, to identify the significant aspects of testing procedure affecting the repeatability and reproducibility as a basis for defining a standard test procedure. In view of the potential influence of material characteristics on LCF life, three classes of alloy were selected for testing according to their cyclic strain behaviour, namely strain-hardening, strain-softening, and stable. This data collection consists of test results on IN 718 alloy at 550°C, which is representative of the cyclic strain-softening case.

1985年5月，一项针对低周疲劳（low cycle fatigue, LCF）试验比对的欧洲项目在欧洲经济共同体参考局（EEC Community Bureau of Reference, BCR）的主持下正式启动。后续依托先进材料与标准凡尔赛项目（Versailles Project on Advanced Materials and Standards, VAMAS），该项目吸纳了更广泛的国际参与方。本项目的核心目标是构建一套符合公认试验规范的高温低周疲劳数据集，并据此明确影响试验重复性与复现性的关键试验环节，为标准试验流程的制定提供依据。鉴于材料特性对低周疲劳寿命存在潜在影响，研究人员依据循环应变行为将合金划分为三类：应变硬化型、应变软化型及稳定型。本次数据集收录的是IN 718合金在550℃下的试验结果，该合金属于典型的循环应变软化型材料。