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ranging from 0.001 to 0.1 /s and temperature ranging from 323 to 573 K was studied on Instron?8032 tensile tester. A constitutive equation using up-dated Fields-Backofen equation was established... strain rate, the steady state flow characteristics appear, showing dynamic recovery. Key words: 5182 aluminum alloy; warm tensile; flow stress; constitutive equation ......
, the relationship between short-term creep strain rate and stress was deduced. Then, the short-term creep constitutive equation of Ti6Al4V alloy at high temperature was obtained by fitting the creep...; short-term creep; constitutive equation Ti6Al4V(即TC4合金)属于α+β型钛合金,具有密度小,比强度高,耐腐蚀性和耐热性好,热稳定性高等特点,因此广泛应用于航天,航空,化工,船舶和医疗等领域[1-4].但是Ti6Al4V合金在冷成形工艺下的回弹量较大,零件的成形精度不高,因此,需要采用热成形并辅助热校形来解决这个问题,而应力松弛和蠕变行为则在热成形和热校......
. The strain hardening coefficient n and deformation activation energy Q are evaluated by linear regression analysis. And the flow stress constitutive equation of the alloy during hot compression is obtained. Key words: Al-Mg-Sc alloy; hot compression; flow stress; constitutive equation ......
, and the peak stress increases with the decrease of deformation temperature or the increase of strain rate. Based on the true stress-true strain curves, the established constitutive equation represents.../Cu-Al2O3 composite; strengthening; hot deformation; dynamic recrystallization; constitutive equation......
℃ and the strain rate from 0.001 s-1 to 1 s-1. The influence of temperature, strain rate and strain rate on the flow stress behavior during hot deformation was described, and the constitutive equation... with the increase of strain rate, and tends to decrease with the increase of deformation temperature. Key words: TB6 titanium alloy; hot compression deformation; flow stress; constitutive equation TB6合金名义成分为......
. With the increase of true strain, due to the work hardening of the alloy, the true stress attains the peak, and then flow softening occurs. The constitutive equation for high temperature deformation... alloy; high temperature deformation; flow stress; constitutive equation BTi-62421S合金是宝钛集团自主研发的一种新型近α高温钛合金,具有比强度高,蠕变性能及热强性能好等突出优点,可满足高结构效益,高可靠性结构件的使用,具有良好的应用前景.高温钛合金在获得最终产品之前,需要在β单相区或α+β两相区进行热加工[1].而......
of the alloy during hot compression deformation can be described by constitutive equation in hyperbolic sine function and can also be described by Zener-Hollomon parameters, and the hot deformation activation energy is 173.375 kJ/mol. Key words: metallic materials; aluminum alloy; hot compression deformation; microstructure; constitutive equation 2A14铝合金属于Al-Cu-Mg-Si系锻造合金,也被称为高强度锻铝,该合金具有强度高,热塑性好,工作......
temperature is 750 and 800 ℃, the flow stress decreases after a peak value, showing continuous dynamic recrystallization. Both the hot deformation activation energy and constitutive equation were derived from the correlativity of flow stress, strain rate and temperature. Key words: Cu-2.0Ni-0.5Si-0.03P alloy; hot compression deformation; dynamic recrystallization; constitutive equation ......
, respectively, and the constitutive equation fitting peak stress state was obtained. The results show that the true stress-true train curves have different characteristics under different deformation... sensitivity exponent and activation energy vary with the change of different deformation conditions. Key words: Ti3Al alloy; hot deformation; peak stress; constitutive equation Ti-24Al-17Nb-0.5Mo合金是一......
by single-stroke compression test on MMS-200 test machine at the temperature of 920-1 050 ℃ and the strain rate of 0.004-10 s-1. The constitutive equation of the plastic deformation of FGH4169 alloy... to the processing map. Key words: FGH4169 alloy; hot deformation; dynamic recrystallization; constitutive equation 粉末冶金高温合金是制造新型航空发动机零部件的最佳材料,主要用于制造涡轮盘等高温承力转动零件[1-2].FGH4169合金(粉末Inconel 718合金)是以γ'' (Ni3Nb)为主要强化相的镍基时效......
