実験報告書様式（一般利用課題・成果公開利用）（ ※本報告書は英語で記述してください。ただし、産業利用課題として採択されている方は日本語で記述していただいても結構です。 ）MLF Experimental Report

提出日 Date of Report
04/27/2014

課題番号 Project No.

装置責任者 Name of responsible person

2013B0137

Kenichi Oikawa

実験課題名 Title of experiment

装置名 Name of Instrument/（BL No.）

Nondestructive study of Japanese iron artifacts using pulsed

NOBORU (BL No.10)

neutron imaging for evaluating crystallographic texture and

実施日 Date of Experimentmicrostructure

02/20/2014-02/26/2014

実験責任者名 Name of principal investigator
Manako Tanaka
所属 Affiliation
Tokyo University of the Arts
試料、実験方法、利用の結果得られた主なデータ、考察、結論等を、記述して下さい。（適宜、図表添付のこと）
Please report your samples, experimental method and results, discussion and conclusions. Please add figures andtables for better explanation.
1. 試料 Name of sample(s) and chemical formula, or compositions including physical form.
1. Japanese matchlock gun fabricated by Kunitomo manufacturer, Fe, solid, 101cm, 2kg

2. Japanese matchlock gun (unsigned), Fe, solid, 101.7cm, 2.5kg
3. Fragment of Japanese matchlock gun, Fe, solid, 1cn, 30g
4. Fragment of Japanese matchlock gun, Fe, solid, 1cn, 10g
5. Fragment of Japanese sword, Fe, solid, 12.2cm, 70g
6. Fragment of Japanese sword, Fe, solid, 23.5cm, 200g
7. Fragment of Japanese sword, Fe, solid, 23.3cm, 200g
8. Fragment of Japanese sword, Fe, solid, 26.7cm, 195g
9. Standard iron sample (very low carbon steel), Fe, solid, 2.4cm
10. Standard iron sample (low carbon steel, 0.25mass%C) , Fe, solid, 2cm
11. Standard iron sample (medium carbon steel, 0.5mass%C) , Fe, solid, 3.1cm
12. Standard iron sample (high carbon steel, 1.1mass%C) , Fe, solid, 1.3cm
13. Standard iron sample (high carbon steel, cast iron) , Fe, solid, 2cm

2. 実験方法及び結果 （実験がうまくいかなかった場合、その理由を記述してください。）
Experimental method and results. If you failed to conduct experiment as planned, please describe reasons.
【Experimental method】
Experiment was carried out by pulsed neutron imaging using the time-of-flight (TOF) method. The layout of
the experiment is shown in Fig. 1. We observed the incident neutron TOF spectra and the transmitted neutron1

2. 実験方法及び結果（つづき） Experimental method and results (continued)
TOF spectra. The distortion of the incident spectrum was clearly observed in the transmitted spectrum due to theBragg scattering. A 2D-PSD was used to get the spatial dependent TOF data. Measurements was performed atroom temperature.

Fig.1 Experimental layout【Results】
The experiment was conducted as planned. The parts of the results obtained are shown in Fig.2 and Fig.3. Now
we are still analyzing the obtained data, the shape and the position of the Bragg edge of the samples cautiously.
The information of the preferred orientation, the crystallite size, and crystal strain of the Japanese iron artifacts
such as Japanese matchlock gun and fragment of Japanese sword will clarify the metallurgical characteristics of
those iron artifacts and reveal the traditional Japanese iron making and forging techniques. The final goal of ourstudy is to examine the differences of the metallurgical characteristics of those iron artifacts between themanufacturing technique, manufacturer, manufacturing area and manufacturing age.

Fig.2 Neutron imaging of a Japanese matchlock gun fabricated by Kunitomo manufacturer.

Fig.3 Neutron imaging of a Japanese matchlock gun (unsigned).

2