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TC18近β鈦合金低溫變形過(guò)程中的相變行為
發(fā)布人:上海艾荔艾金屬材料有限公司bt990.com.cn
更新時(shí)間:2015-09-12
TC18近β鈦合金以其高強(qiáng)度、高斷裂韌性和優(yōu)良的抗腐蝕性能得到越來(lái)越廣泛的應(yīng)用,且有望通過(guò)改變加工方式和通過(guò)低溫塑性變形改善其微觀組織從而進(jìn)一步提升合金的綜合力學(xué)性能。通過(guò)準(zhǔn)靜態(tài)拉伸試驗(yàn),實(shí)現(xiàn)TC18鈦合金在低溫下的塑性變形,通過(guò)對(duì)變形微觀組織的觀察分析,研究該合金在低溫變形時(shí)的相變行為。
TC18近β鈦合金低溫變形過(guò)程中的相變行為Phase transformation behavior of TC18 near β titanium alloy deformed at low temperature
TC18近β鈦合金以其高強(qiáng)度、高斷裂韌性和優(yōu)良的抗腐蝕性能得到越來(lái)越廣泛的應(yīng)用,且有望通過(guò)改變加工方式和通過(guò)低溫塑性變形改善其微觀組織從而進(jìn)一步提升合金的綜合力學(xué)性能。通過(guò)準(zhǔn)靜態(tài)拉伸試驗(yàn),實(shí)現(xiàn)TC18鈦合金在低溫下的塑性變形,通過(guò)對(duì)變形微觀組織的觀察分析,研究該合金在低溫變形時(shí)的相變行為。結(jié)果表明;TC18鈦合金能夠在低溫、低應(yīng)變速率下發(fā)生塑性變形。低溫下變形過(guò)程中主要發(fā)生ω相變,并且溫度、應(yīng)變會(huì)對(duì)ω相變行為產(chǎn)生一定的影響。
TC18 near β titanium alloy was wildly applied for its high strength, high breaking tenacity and good corrosion resistance. And it is possible to improve the comprehensive mechanical properties by changing the microstructure through low temperature deformation. The results show that the low temperature deformation of TC18 titanium alloy by using quasi static tensile test is elastic transformation, then, the phase transformation behavior of this alloy was investigated by observing and analyzing the microstructure. The plastic deformation of TC18 titanium alloy occurs under the low temperature and low strain rate. The ω phase transformation happens under low temperature, and will be affected by the temperature and strain.
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