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首页> 外文会议>International Conference on Fracture and Strength of Solids >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 micro turbine. 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_(23)C_6, NbC and Fe_3Nb_3C.
机译：研究了厚度0.25mm的奥氏体不锈钢箔的蠕变变形过程。箔标本在750℃，54MPa测试时蠕变，以建立基线行为，因为其延长用途是先进的微型涡轮机中的主要表面恢复器。箔的蠕变曲线表明，初级蠕变阶段是简短的，蠕变的寿命由第三次蠕变变形为主。该曲线由改进的θ投影概念模型具有良好的，具有硬化和软化术语。裂缝箔表面的形态显示颈部骨折与刻面空隙浅网络。 W型蠕变腔的形成是显着的，如破裂样本的微观结构所揭示的那样。成分分析表明碳化物的形成，即Cr_（23）C_6，NBC和Fe_3NB_3C。

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