The paper focuses on a seventeenth century Japanese helmet (kabuto) from the Saotome School; previous investigations revealed that its lamellae, made of high-quality low-carbon steel, were assembled following a novel structure that suggested higher resistance to firearms. Neutron diffraction represents the ideal technique for the characterisation of the microstructural properties of metals. In this work, neutron diffraction on a highly collimated instrument, such as ENGIN-X (ISIS, UK), was used to quantify the distribution of residual strains along lamellae arranged in this newly discovered assembly method, and therefore infer on the mechanical properties of the Saotome kabuto. Here, we present novel results investigating residual stresses from diffraction measurements by using the instrument ENGIN-X. This study completes the previous cycle of neutron measurements on this sample and sheds light on the effectiveness of the assembly method of the plates.

本文着重介绍了早乙女学校（Saoome School）的17世纪日本头盔（kabuto）；先前的调查表明，它的薄片由高质量的低碳钢制成，是按照一种新颖的结构组装而成的，该结构表明枪支具有更高的抵抗力。中子衍射代表了表征金属微结构特性的理想技术。在这项工作中，使用了高度准直的仪器（例如ENGIN-X（英国ISIS）上的中子衍射）来量化沿这种新发现的组装方法排列的薄片沿板的残余应变的分布，从而推断出其力学性能。早乙女kabuto。在这里，我们提出了使用仪器ENGIN-X研究来自衍射测量的残余应力的新颖结果。这项研究完成了该样品的中子测量的前一个周期，并阐明了板组装方法的有效性。