Abstract The influence of graphite morphology on the corrosion-fatigue mechanism in the cast compacted graphite iron SiMo1000 is investigated. Two batches of SiMo1000 with the same chemical composition but different nodularity are tested using low-cycle-fatigue tests in argon and a synthetic exhaust atmosphere at 800 °C. Decreased graphite nodularity is found to significantly reduce the corrosion resistance of SiMo1000, causing severe decarburization on the sample surface. Besides, the fatigue life is also dramatically reduced with decreased graphite nodularity. The synergy of decarburization and fatigue is found to reduce fatigue life in one of the batches.

中文翻译：

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石墨形貌对铁素体Si-Mo-Al铸铁SiMo1000腐蚀疲劳性能的影响

摘要 研究了石墨形貌对铸造蠕墨铸铁SiMo1000腐蚀疲劳机理的影响。在 800 °C 的氩气和合成排气气氛中使用低循环疲劳试验对两批化学成分相同但球化率不同的 SiMo1000 进行了测试。发现减少的石墨球化显着降低了 SiMo1000 的耐腐蚀性，导致样品表面严重脱碳。此外，疲劳寿命也随着石墨球化率的降低而显着降低。发现脱碳和疲劳的协同作用会降低其中一批的疲劳寿命。