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固溶處理對(duì)Ti2448合金低周疲勞性能的影響
發(fā)布人：上海艾荔艾金屬材料有限公司www.bt990.com.cn
更新時(shí)間：2015-09-08
研究室溫下固溶處理對(duì)熱軋態(tài)Ti-24Nb-4Zr-8Sn(簡(jiǎn)稱(chēng)Ti2448)合金在應(yīng)變控制(R=0.1)下的低周疲勞性能的影響。
固溶處理對(duì)Ti2448合金低周疲勞性能的影響Effects of solid solution treatment on low cycle fatigue performance of Ti2448
研究室溫下固溶處理對(duì)熱軋態(tài)Ti-24Nb-4Zr-8Sn(簡(jiǎn)稱(chēng)Ti2448)合金在應(yīng)變控制(R=0.1)下的低周疲勞性能的影響。結(jié)果表明：合金經(jīng)(750℃，30 min)固溶處理后(簡(jiǎn)稱(chēng)SS)，形成再結(jié)晶組織，該組織比熱軋態(tài)合金的更均勻。與熱軋態(tài)合金相同，SS合金同樣具有超彈性。SS處理后，合金具有較高的低周疲勞壽命，并且在高應(yīng)變幅下，其低周疲勞性能較熱軋態(tài)合金的好；而在低應(yīng)變幅下，其低周疲勞性能比熱軋態(tài)合金的稍差。XRD分析表明，隨著應(yīng)變幅的增加，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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