Study for innovative analysis system of metallic materials with collaboration between microstructure measurement by neutron beam and crystal plasticity

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289265
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Material processing/Microstructural control engineering
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Takamura Masato 国立研究開発法人理化学研究所, 光量子工学研究領域, 研究員 (00525595)
• Co-Investigator(Kenkyū-buntansha): OTAKE YOSHIE 理化学研究所, 光量子工学研究領域, チームリーダー (50216777) ; HAMA TAKAYUKI 京都大学, エネルギー科学研究科, 准教授 (10386633) ; SUNAGA HIDEYUKI 理化学研究所, 光量子工学研究領域, 研究員 (70442978)
• Co-Investigator(Renkei-kenkyūsha): TAKETANI ATSUSHI 理化学研究所, 光量子工学研究領域, 副チームリーダー (30222095)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 中性子回折 / 小型中性子源 / 集合組織 / 結晶塑性 / 有限要素法 / 残留オーステナイト / 極点図

Outline of Final Research Achievements

A measurement system for micro-structure of metallic materials by neutron diffraction has been developed in Riken Accelerator based compact Neutron Source (RANS). Through this system, we succeeded in observing the change of texture in steel sheets before and after plastic deformation by analyzing the diffraction profiles obtained with respect to wave length. In addition, pole figures were successfully obtained from the diffraction patterns measured in various diffraction angles. Above pole figures were compared with those obtained by X-ray diffraction, showing the similar tendencies, and, as a result, the validity of the neutron diffraction for texture measurement were suggested.
On the other hand, material tests and numerical simulations by crystal plasticity for magnesium and titanium alloy were performed. Evolution of the texture was investigated experimentally and numerically, which was able to be compared with measurement results obtained by neutron diffraction.

Free Research Field

塑性加工学、計算力学