(西安交通大學(xué) 金屬材料強度國家重點實驗室， 西安 710049)
摘 要: 研究了滲氫前后國產(chǎn)Zr-4合金板軋制平面內(nèi)不同取向的基本力學(xué)性能及其斷裂性質(zhì)。結(jié)果表明：滲氫前后國產(chǎn)Zr-4合金板均為面內(nèi)各向同性、厚向各向異性的材料，氫化物的出現(xiàn)對其各向異性行為無顯著影響，僅稍微提高了材料的強度，如彈性模量、屈服強度及斷裂強度等，但卻大大降低了材料的延性；氫化物對材料延性的影響主要集中在材料的非均勻變形階段；采用圓盤狀的單位胞有限元模型可以較好地預(yù)測滲氫后Zr-4合金的力學(xué)性能。
關(guān)鍵字: Zr-4合金；氫化物；力學(xué)性能；有限元模型
on mechanical behavior of zircaloy-4
sheets and FEM simulation
（State Key Laboratory for Mechanical Behavior of Materials,
Xi′an Jiaotong University, Xi′an 710049, China）
Abstract:The mechanical behavior of zircaloy-4 sheets， before and after hydridizat ion, was studied with three orientations (L, LT，T) in their planes, as well as fracture characteristics. It is shown that nonhydrided and hydrided zircaloy-4 sheets have isotropic properties in their plane and anisotropic properties in throughthickness direction. There is no significant effect of hydride on plate's anisotropy for mechanical properties. However, the hydride precipitation can lightly strengthen the material, such as modulus of elasticity, yielding stress, fracture strength, and greatly reduce the ductility. The deleterious effect of hydride precipitation on ductility of zircaloy-4 sheets occurs mainly at the unstable deformation stage. The mechanical behaviors of hydrided zircaloy-4 sheets ca n be predicted well by the circle plate unit cell model.
Key words: zircaloy-4 sheet; hydride; mechanical behavior; FEM model
