|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 低温多向锻造锆-4合金的力学性能和超细晶组织演化(英文)显示文摘研究低温(77K)多向锻造锆-4合金累积应变为1.48,2.96,4.44和5.91时的力学性能和组织演变。通过万能拉伸测试和维氏硬度实验测得多向锻造合金的力学性能。相对于原始合金,当锆-4合金变形的累积变形为5.91时,其极限抗拉强度从474MPa提高到717MPa,维氏硬度从HV 190提高到HV 238。然而,由于锆-4合金的低应变硬化,其延展性显著降低(18%-3.5%)。变形合金强度和硬度的提高是因为多向锻造引起的晶粒尺寸效应和高的位错密度。采用光学显微镜和透射电镜表征变形试样的显微组织演化。当累积应变为5.91时,经12次多向锻造后合金的微观组织演化主要是超细晶的形成,其平均晶粒尺寸为150-250nm。 | D.FULORIA S.GOEL R.JAYAGANTHAN D.SRIVASTAVA G.K.DEY N.SAIBABA | 2015 | Transactions of Nonferrous Metals Society of China2015，25，7： | 2 |
| 2 | Texture Evolution and Ultrafine Grain Formation in Cross-Cryo-Rolled Zircaloy-2显示文摘The texture and mechanical properties of cross-rolled zircaloy-2 at 77 and 300 K were investigated.Crossrolling at 77 K was performed to impart different thickness reductions of 25% and 50%,while at 300 K with 25%,50%,75% and 85% reductions to the sample.EBSD analysis of deformed sample showed that near-basal orientation is not deformed completely after 50% rolling reduction.The activation of prismatic silp,f11 '22g contraction twin and f10' 12 g extension twin were evident from the deformed microstructure at 77 K.The propensity for activation of basal slip \a[ at77 K was also observed.The deformation of the sample at 300 K occurs by prismatic,basal \a[ and pyramidal \c a[slips,which were predicted by pole figures.After annealing,the tensile strengths(735 and 710 MPa) are almost the same for 50% cryo-cross-rolled and room-temperature cross-rolled zircaloy-2 with almost 2.7% difference in their ductility.KAM analysis of the deformed samples was made to estimate the stored strain energy and dislocation density.Annealing of deformed sample at 673 K for 30 min results in recrystallization,which leads to the formation of ultrafine grains. | Sunkulp Goel R.Jayaganthan I.V.Singh D.Srivastava G.K.Dey N.Saibaba | 2015 | Acta Metallurgica Sinica(English Letters)2015，28，7： | 0 |
| 3 | 两相区各相激活能对Zr-2.5Nb-0.5Cu合金本构方程的影响(英文)显示文摘通过计算Zr-2.5Nb-0.5Cu合金两相区各相激活能,研究该合金在热变形过程中的主要存在相。在温度为700~925°C、应变速率为10^(-2)~10^(-3) s^(-1)的条件下对Zr-2.5Nb-0.5Cu合金进行热机械压缩实验。单相流动应力推广用于两相区各相流动应力的计算,然后利用所得两相区流动应力数据来计算各相的激活能。对计算所得激活能数据进行比较可知,α相为两相区的主要相(形变控制相)。根据形变温度范围或各相存在形式,采用正弦双曲线型本构方程建立了合金的本构方程。统计学分析结果表明,从相关系数(R)和平均相对误差(AARE)考虑,采用为某特定相建立的本构方程所得计算结果与实验结果相符。 | K.K.SAXENA S.K.JHA V.PANCHOLI G.P.CHAUDHARI D.SRIVASTAVA G.K.DEY N.SAIBABA | 2017 | Transactions of Nonferrous Metals Society of China2017，27，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员