Hierarchical deformation heterogeneity during Lders band propagation in an Fe-5Mn-0.1C medium Mn steel clarified through scanning electron microscopy

Koyama, Motomichi*; Yamashita, Takayuki*; Morooka, Satoshi; Yang, Z.*; Varanasi, R. S.*; Hojo, Tomohiko*; Kawasaki, Takuro; Harjo, S.

Tetsu To Hagane, 110(3), p.205 - 216, 2024/02

https://doi.org/10.2355/tetsutohagane.TETSU-2023-052

Neutron stress measurement of W/Ti composite in cryogenic temperatures using time-of-flight method

Nishida, Masayuki*; Harjo, S.; Kawasaki, Takuro; Yamashita, Takayuki*; Gong, W.

Quantum Beam Science (Internet), 7(1), p.8_1 - 8_15, 2023/03

https://doi.org/10.3390/qubs7010008

Hierarchical deformation heterogeneity during Lders band propagation in an Fe-5Mn-0.1C medium Mn steel clarified through scanning electron microscopy

Koyama, Motomichi*; Yamashita, Takayuki*; Morooka, Satoshi; Yang, Z.*; Varanasi, R. S.*; Hojo, Tomohiko*; Kawasaki, Takuro; Harjo, S.

ISIJ International, 62(10), p.2043 - 2053, 2022/10

https://doi.org/10.2355/isijinternational.ISIJINT-2022-098

In-situ neutron diffraction study of lattice deformation behaviour of commercially pure titanium at cryogenic temperature

Lee, M.-S.*; Kawasaki, Takuro; Yamashita, Takayuki*; Harjo, S.; Hyun, Y.-T.*; Jeong, Y.*; Jun, T.-S.*

Scientific Reports (Internet), 12(1), p.3719_1 - 3719_10, 2022/03

https://doi.org/10.1038/s41598-022-07640-3

Stress partitioning behavior of duplex alloys consisting of BCC and FCC phases at low temperature

Yamashita, Takayuki; Tomono, Shohei*; Morooka, Satoshi; Harjo, S.; Kawasaki, Takuro; Nameki, Tatsuya*; Koga, Norimitsu*; Umezawa, Osamu*

JPS Conference Proceedings (Internet), 33, p.011064_1 - 011064_6, 2021/03

https://doi.org/10.7566/JPSCP.33.011064

Effect of solute carbon on the characteristic hardening of steel at high temperature

Koga, Norimitsu*; Umezawa, Osamu*; Yamamoto, Masayuki*; Yamamoto, Takashi*; Yamashita, Takayuki; Morooka, Satoshi; Kawasaki, Takuro; Harjo, S.

Metallurgical and Materials Transactions A, 52(3), p.897 - 901, 2021/03

https://doi.org/10.1007/s11661-020-06113-4

In-situ neutron diffraction during tensile at low temperature and phase stability of austenite on low alloy steel

Yamashita, Takayuki; Morooka, Satoshi; Koga, Norimitsu*; Umezawa, Osamu*

no journal, , 

no abstracts in English

In-situ neutron diffraction during tensile under low temperature in low alloy steel containing metastable austenite

Yamashita, Takayuki; Morooka, Satoshi; Harjo, S.; Koga, Norimitsu*; Umezawa, Osamu*

no journal, , 

Volume fraction, phase stresses and crystal orientation in low alloy steel containing metastable austenite were investigated using by in-situ neutron diffraction during tensile under low temperatures. The martensite showed much higher phase stress than the other phases at each test temperatures. The phase stresses of ferrite matrix plus bainite and martensite increased as decreasing test temperature. The austenite phase stress was constant as increased applied true stress at low temperatures. It's suggested that austenite transformed to martensite prior to plastic deformation. The austenite which 111 direction parallel to tensile direction (111-A) is most stable at 293 K. At low temperatures, the 111-A transformed to martensite at early stage of deformation. The relative integrated intensity of 111-A was constant at later stage of deformation. It means that stable 111-A do not transformed to martensite during homogeneous deformation also at low temperatures.

Engineering materials diffractometer TAKUMI and scientific trends

Harjo, S.; Kawasaki, Takuro; Gong, W.*; Yamashita, Takayuki; Morooka, Satoshi; Suzuki, Hiroshi; Aizawa, Kazuya

no journal, , 

Deformation behavior of medium manganese steels by neutron diffraction

Morooka, Satoshi; Yamashita, Takayuki; Harjo, S.; Tsuchiyama, Toshihiro*

no journal, , 

no abstracts in English