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Microstructural evolution and fcc twinning behavior during hot deformation of high temperature titanium alloy Ti65

Journal of Materials Science & Technology 2020年第14期47卷 56-69页

作者： Zhixin Zhang Jiangkun Fan Bin Tang Hongchao Kou Jian Wang Xin Wang Shiying Wang Qingjiang Wang Zhiyong Chen Jinshan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’anShaanxi710072China National&Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials Xi’anShaanxi710072China Baoti Group Ltd. BaojiShaanxi721014China School of Materials Science and Engineering Changzhou UniversityChangzhouJiangsu213164China Institute of Metal Research Chinese Academy of SciencesShenyangLiaoning 110016China

Although the development of titanium alloys with working temperatures above 600?C faces enormous difficulties and challenges,the related research has not *** the present work,detailed analyses on microstructure evolution and hot deformation behavior of a new temperature resistant 650?C titanium alloy Ti65 were investigated from micrometer scale to nanometer *** results revealed that lamellarαgrains gradually fragmentized and spheroidized during theα+βphase region compression and the orientation of the c-axis ofαgrains gradually aligned to radial directions,forming two high Schmid factors(SFs)value texture eventually with the increase of strain to ***,there were some strengthening characters in theα+βphase region such as lenticularαsand nano silicide(TiZr)6 *** theβphase region,fine equiaxed dynamic recrystallized(DRX)βgrains were ***,the variant selection ofαm′artensite followed Burgers orientation relationship during the compression *** main deformation mechanisms of theα+βphase region were dislocation slip and orientation dependent ***,the deformation process in theβphase region was controlled byβgrain ***,many nano scale fcc twins were generated at the interface ofαl′ath during deforming in theβphase region,which was firstly observed in Ti65 alloy.

关键词： High temperature titanium alloy Hot deformation Microstructure evolution Texture fcc twin

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MICROSTRUCTURE AND MORPHOLOGY OF HIGH MANGANESE NON-MAGNETIC STEEL

引用

Acta Metallurgica Sinica(English Letters) 1990年第3期3卷 158-163页

作者： YANG Yanqing MA Shiliang QIN Xiongpu KANG Mokuang Northwestern Polytechnical University,Xi’an,China YANG Yanqing,Graduate student,Dept.of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China

Two types of lath structures and kinked ε martensite were observed in the high manganese non-magnetic *** the short non-continuous lath formed by quenching and the long thin straight lath induced by plastic deformation are composed of ε martensite and fcc twin. The transformation mechanism was *** crystallographic analysis indicates that the e martensite at both sides of the fcc twin boundary is of kinked morphology owing to the orientation of their matrices differing from each *** kinked region is hcp twin.

关键词： εmartensite fcc twin lath structure kink

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