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首页> 外文期刊>ISIJ international >Influence of Microstructure Difference of Stainless Steels on the Strength and Fracture of Bolted Connections
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Influence of Microstructure Difference of Stainless Steels on the Strength and Fracture of Bolted Connections

机译：不锈钢的微观结构差异对螺栓连接强度和断裂的影响

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摘要

Recently, since stainless steel has a variety of significant characteristics such as corrosion resistance, durability, aesthetic appeal and fire resistance, the use of stainless steel in construction has been steadily increasing. Also, stainless steels can be classified into five main groups; austenitic, ferritic, martensitic, duplex and precipitation hardening according to metallurgical microstructure. Austenitic stainless steels are the most widely utilized in buildings. This paper focused on comparing material properties and ultimate behaviors such as strength, fracture mode and curling effect of single shear bolted connections fabricated with two different stainless steels; austenitic and ferritic types. Bolt arrangement and end distance in the parallel direction of applied load are considered as main variables. Specimens have same edge distance perpendicular to the direction of load, plate thickness, bolt diameter, pitch and gauge. A monotonic tensile test has been carried out for specimens under shear and some bolted connections with long end distance were accompanied by curling; out of plane deformation, which caused strength reduction. Furthermore, it is found that the fracture shape and curling effect patterns of two kinds of bolted connections differ from two stainless steel materials.
机译：近来，由于不锈钢具有多种重要特性，例如耐腐蚀性，耐久性，美观性和耐火性，因此不锈钢在建筑中的使用稳步增加。另外，不锈钢可分为五大类。根据冶金组织，奥氏体，铁素体，马氏体，双相和沉淀硬化。奥氏体不锈钢是建筑中使用最广泛的。本文着重比较两种不同不锈钢制成的单剪切螺栓连接的材料性能和最终性能，例如强度，断裂模式和卷曲效果；奥氏体和铁素体类型。螺栓布置和平行于施加载荷方向的末端距离被视为主要变量。试样的垂直于载荷方向，板厚，螺栓直径，螺距和规格的边缘距离相同。在剪切下对试样进行了单调拉伸试验，一些长距离末端的螺栓连接伴随着卷曲。平面变形，导致强度降低。此外，发现两种螺栓连接的断裂形状和卷曲效果模式与两种不锈钢材料不同。

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