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首页> 外文会议>Fracture and strength of solids VII >Creep Deformation Characteristics of Austenitic Stainless Steel Foils
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Creep Deformation Characteristics of Austenitic Stainless Steel Foils

机译：奥氏体不锈钢箔的蠕变变形特性

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Creep deformation process of austenitic stainless steel foil with thickness 0.25 mm was investigated. The foil specimen was creep tested at 750°C, 54 MPa to establish baseline behavior for its extended use as primary surface recuperator in advanced microturbine. The creep curve of the foil shows that the primary creep stage is brief and creep life is dominated by tertiary creep deformation. The curve is well represented by the modified theta-projection concept model with hardening and softening terms. Morphology of fractured foil surface reveals intergranular fracture with shallow network of faceted voids. The formation of w-type creep cavities is significant, as revealed by microstructure of ruptured specimen. Composition analysis indicates the formation of carbides, namely, Cr_23C_6, NbC and Fe_3Nb_3C.
机译：研究了厚度为0.25 mm的奥氏体不锈钢箔的蠕变变形过程。箔样品在750°C，54 MPa下进行蠕变测试，以建立基线性能，以扩展其用作高级微型涡轮机的主表面换热器。箔片的蠕变曲线表明，初级蠕变阶段很短，蠕变寿命主要由三次蠕变引起。曲线由带有硬化和软化项的改进的theta投影概念模型很好地表示。破裂的箔表面的形态显示出晶间断裂和浅层多面空隙。 w型蠕变腔的形成很明显，这是由破裂试样的微观结构所揭示的。成分分析表明形成了碳化物，即Cr_23C_6，NbC和Fe_3Nb_3C。

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