Developments of Bulk Plate of Amorphous Alloy Ribbons and Its Reliability Analysis

各种非晶合金因其高强度和电磁性能而被开发并应用于机械领域。强度分布对机械结构的安全可靠性评价起着重要的作用。实验研究了铁基非晶合金带的拉伸和疲劳性能的分布特征。主要结论总结如下：(1)室温至300℃抗拉强度分布图。C由具有三个参数的威布尔型的一般总体分布控制。(2)结晶开始于400℃，完成于500℃。400℃时的抗拉强度由于结晶而具有明显的散点，用组合分布的概念可以很好地解释其分布特征。(3)建立了多层复合板的制作工艺，其强度由每层非晶带的强度积分给出。(4)在脉动张力作用下，材料的疲劳特性具有明显的离散性。因此，应在机械设计和安全分析中引入统计方法。

Various kinds of amorphous alloys were developed and applied to the mechanical use due to the high strength as well as the electro-magnetic materials. Distribution aspect of the strength plays an important role in evaluation of the safety and reliability of the mechanical structures. In this study, distribution characteristics of tensile and fatigue properties of Fe base amorphous alloy ribbons were experimentally examined. Main conclusions obtained are summarized as follows ;(1) Distribution aspect of tensile strength at temperatures from RT to 300deg. C is governed by a common population distribution of Wiebull type having three parameters.(2) Crystalization begins to occur at 400deg.C and completed at 500deg.C.Tensile strength at 400deg.C has a distinct scatter due to the crystalization and the distribution characteristics are well explained by means of a concept of combined distribution.(3) Fabrication process of multi-plied composite plate was established such that the strength of the plate was given by integration of the strength for each ply of the amorphous ribbons.(4) It was found that the fatigue property in pulsating tension had a distinct scatter. Thus statistical procedure should be introduced to the machine design and the safety analysis.