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固溶处理对Ti2448合金低周疲劳性能的影响
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-09-08
研究室温下固溶处理对热轧态Ti-24Nb-4Zr-8Sn(简称Ti2448)合金在应变控制(R=0.1)下的低周疲劳性能的影响。
固溶处理对Ti2448合金低周疲劳性能的影响Effects of solid solution treatment on low cycle fatigue performance of Ti2448
研究室温下固溶处理对热轧态Ti-24Nb-4Zr-8Sn(简称Ti2448)合金在应变控制(R=0.1)下的低周疲劳性能的影响。结果表明：合金经(750℃，30 min)固溶处理后(简称SS)，形成再结晶组织，该组织比热轧态合金的更均匀。与热轧态合金相同，SS合金同样具有超弹性。SS处理后，合金具有较高的低周疲劳寿命，并且在高应变幅下，其低周疲劳性能较热轧态合金的好；而在低应变幅下，其低周疲劳性能比热轧态合金的稍差。XRD分析表明，随着应变幅的增加，α2相的析出含量增大。
The studies effects of solid solution treatment on low cycle fatigue (R=0.1) controlled by the strain properties of Ti-24Nb-4Zr-8Sn (Ti2448) alloy at room temperature was investigated. The result shows that the alloy after (750 ℃, 30 min) solid solution treatment (SS), the recrystallization organization forms, which is more uniform than that of the hot rolled state alloy. As the same as the hot rolled state alloy, the SS alloy also has super elasticity. After SS treatment, the alloy has the high life of low cycle fatigue (LCF), and presents higher LCF performance than that of hot rolled alloy at high strain amplitude. However, at low strain amplitude, the LCF performance of SS alloy is a bit poorer than that of hot rolled alloy. XRD analysis shows that with the increase of strain amplitude, the content of α2 precipitation increases.
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