Hot working of Ti-6Al-3Mo-2Zr-0.3Si alloy with lamellar α plus β starting structure using processing map
Hot working of Ti-6Al-3Mo-2Zr-0.3Si alloy with lamellar α plus β starting structure using processing map
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DOI：
10.1016/j.matdes.2008.07.031
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发表时间：
2009-05-01
影响因子：
8.4
通讯作者：
Cui, X. P.
中科院分区：
文献类型：
--
作者：
Li, A. B.;Huang, L. J.;Cui, X. P.
通过加工图表征了层状α+β起始组织Ti-6Al-3Mo-2Zr-0.3Si合金在850~1050℃温度范围、应变速率0.001~1s(-1)范围内的热变形行为。 α+β相场中的加工图呈现出动态再结晶(DRX)域，在950℃和0.001s(-1)时功率耗散峰值效率约为56%，这是层状球化的最佳条件。在P相场中，代表功率耗散效率约为48%的较低应变率域代表P相DRX。在高于0.5 s(-1)的较高应变率下，a+p相场中由于绝热剪切带和层状扭结而出现流动不稳定，并且避免了相应的加工条件。最后建议Ti-6Al-3Mo-2Zr-0.3Si合金的热加工最好在1050℃、0.001s(-1)的β相场和950℃、0.001s(-1)的α+β相场进行。 (c) 2008 Elsevier Ltd. 保留所有权利。
The hot deformation behavior of Ti-6Al-3Mo-2Zr-0.3Si alloy with lamellar alpha + beta starting structure was characterized in the temperature range of 850-1050 degrees C and strain rate range of 0.001-1 s(-1) by processing maps. The processing map in the alpha + beta phase field exhibits a domain of dynamic recrystallization (DRX) with a peak efficiency of power dissipation of about 56% at 950 degrees C and 0.001 s(-1), which is the optimum condition of lamellar globularization. In the P phase field, a lower strain rate domain with a representative power dissipation efficiency of about 48% represents P phase DRX At higher strain rates above 0.5 s(-1), flow instability occurs in the a + p phase field due to adiabatic shear bands and lamellar kinking, and the corresponding processing conditions are avoided. Finally, it is recommended that hot working of Ti-6Al-3Mo-2Zr-0.3Si alloy is best conducted in the beta phase field at 1050 degrees C and 0.001 s(-1), and in the alpha + beta phase field at 950 degrees C and 0.001 s(-1). (c) 2008 Elsevier Ltd. All rights reserved.