ABSTRACT Ductile cast irons are often used for turbocharged diesel engine components. These components are usually subjected to cyclic thermo-mechanical loading during their lifetime due to variable service conditions. A reliable damage assessment is required to guarantee service function, safety or light weight of the products. The first objective of this paper is to introduce the new test stand designed for uniaxial Low Cycle Fatigue (LCF) and Thermo-Mechanical Fatigue (TMF) tests. The second objective of the paper is to assess the lifetime of SiMo (Silicon Molybdenum) cast iron. Based on the experimental results, an appropriate energy-based fatigue criterion is proposed for predicting the LCF/TMF of complex engineering components. Reasonable correlation was achieved between the observed results and the predicted results.

中文翻译：

---

LCF和TMF加载条件下SiMo 4.06铸铁的寿命评估

摘要 球墨铸铁通常用于涡轮增压柴油发动机部件。由于使用条件的变化，这些部件在其使用寿命期间通常会承受循环热机械载荷。需要可靠的损坏评估来保证产品的服务功能、安全性或轻量化。本文的第一个目标是介绍专为单轴低周疲劳 (LCF) 和热机械疲劳 (TMF) 测试设计的新测试台。该论文的第二个目的是评估 SiMo（硅钼）铸铁的使用寿命。基于实验结果，提出了一种合适的基于能量的疲劳准则，用于预测复杂工程部件的 LCF/TMF。观测结果与预测结果之间取得了合理的相关性。