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Tensile deformation and texture evolution in brittle/ductile multilayered steel sheet studied by neutron diffraction

Xu, P. G.  ; Ojima, Mayumi*; Suzuki, Hiroshi ; Nambu, Shoichi*; Inoue, Junya*; Onuki, Yusuke*; Harjo, S.  ; Akita, Koichi

Bulk textures of austenite/nickel/martensite/nickel/austenite multilayered steel and monolithic martensite steel after uniaxial extension were off-line measured using time-of-flight neutron diffraction texture measurement and Rietveld texture analysis techniques. The martensite layer containing {111}$$<$$112$$>$$ initial component exhibited certain {111}$$<$$hkl$$>$$-fiber orientation splitting characteristics during 5$$sim$$10% extension, then such transient splitting texture components reoriented into {111}$$<$$110$$>$$ component after 15% extension. The comparison with ferrite texture evolutions in ferrite-austenite multilayered steel and ferrite monolithic steel revealed that above orientation splitting is related to the multiphase interlayer constraint and the phase stress partitioning between martensite and austenite.



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