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计算机应用文摘 2003年第9期19卷 103-103页

美卓推出新型OptiDry twin冲击式干燥方案

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福建纸业信息 2006年第21期 10-10页

赛普拉斯和twin Paradox实现PDA的USB主机连通性

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电子测试 2004年第1期17卷 29-29页

LG twin Wash双层滚筒波轮二合一洗衣机上市

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电子质量 2015年第8期 63-63页

作为LG本年度最受关注家电之一的twin Wash滚筒波轮二合一洗衣机,在经历年初在CES 2015和之后的中国家电博览会上展示预热之后,近日终于迎来在韩国地区的正式发售。这款洗衣机除了融入时下颇为流行的"互联网思维"之外,最大的特点在于在... 详细信息

作为LG本年度最受关注家电之一的twin Wash滚筒波轮二合一洗衣机,在经历年初在CES 2015和之后的中国家电博览会上展示预热之后,近日终于迎来在韩国地区的正式发售。这款洗衣机除了融入时下颇为流行的"互联网思维"之外,最大的特点在于在上层的滚筒洗衣机下方加入了一个抽屉式的mini波轮洗衣机。

关键词：洗衣机日用电气器具波轮二合一 twin

Multi-dimensional morphology of hydride diffusion layer and associated sequential twinning in commercial pure titanium

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Journal of Materials Science & Technology 2022年第8期103卷 105-112页

作者： Qian Wang Shun Xu Yajun Zhao Jean-Sébastien Lecomte Christophe Schuman Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux(LEM3) Universitéde Lorraine CNRSArts et Métiers ParisTechMetz57073France Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures(DAMAS) University of Lorraine57073France School of Iron and Steel Soochow UniversitySuzhou 215021China School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116021China

The dominant hydride precipitates have been well demonstrated to follow two types of orientation relationships(ORs)with Ti matrix:OR1 with{0001}//{001},//and OR2 with{0001}//{111},//.Within the grains with special orientations,the complicated interactions of different hydride variants inside Ti-hydride diffusion layer are characterized in this *** OR1 hydride layer,the orientations of{1010}plane parallel to the sample surface and a-axis parallel to the normal direction prefer multiple OR1 *** orientations favorable for OR2 hydride layer are:{1013}plane parallel to sample surface corresponding to the layer with one OR2 variant dominated and c-axis parallel to the surface normal with multiple OR2 variant layer ***,{1012}extension twins and{1122}contraction twins are activated to accommodate the OR2 hydride-induced surface expansion and local misfit *** stimulation of these two twins is also orientation-dependent:{1012}and{1122}twins are observed in the grains with c-axis parallel to and deviated from the surface normal,*** further variant selection for each twin mode is performed through shear accommodation of hydride-twin pairs.

关键词： Titanium Hydride Cross section twin Variant selection

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The assisting and stabilizing role played by ω phase during the {112}〈111〉_β twinning in Ti-Mo alloys:A first-principles insight

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Journal of Materials Science & Technology 2021年第21期80卷 163-170页

作者： Qiu-Jie Chen Shang-Yi Ma Shao-Qing Wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

The ω phase is commonly observed in β-Ti alloys and plays a significant role on various properties ofβ-Ti *** many results about the role of ω phase on mechanical properties of β-Ti alloys have been derived from theoretical and experimental studies,the role of ω phase on deformation mechanism hitherto remains elusive and deserves to be further *** this work,the role played by ω phase during the {112} _(β) twining in Ti-Mo alloys were investigated by first-principles calculations at atomic *** the energy favorable interface of(112)_(β)(110)_(ω),we found that partial dislocations slipping on the successive(1010)_(ω)planes of ω phase can lead to the formation of {112} _(β) twin *** the twin nucleus grows inwards ω grain interior through atomic ***,a new twinning mechanism of {112} _(β) assisted by ω phase was ***,our calculations indicated that the appearance of ITB(interfacial twin boundary) ω phase can improve the stability of the symmetrical{112} _(β) twin boundary(TB),which can well explain the experimental phenomenon that the ITBω phase always accompanies the formation of {112} _(β) ***,a probable microstructure evolution sequence was suggested,namely β matrix→β matrix+athermal ω phase→(112)[111]_(β) twin+ITB ω *** calculations provide new insights on the role played byω phase during the twinning process of {112} _(β),which can deepen the understanding on the deformation behaviors of β-Ti alloys.

关键词： Titanium alloys twin Interfacial twin boundary phase Generalized planar fault energy First-principles

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twinning, grain orientation, and texture variations in Mg alloy processed by pre-rolling

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Progress in Natural Science:Materials International 2019年第2期29卷 231-236页

作者： Qingshan Yang Qingwei Dai Chao Lou Jiahong Dai Jianyue Zhang Bin Jiang Fusheng Pan School of Metallurgy and Material Engineering Chongqing University of Science and Technology National Engineering Research Center for Magnesium Alloys Chongqing University National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials Chongqing Jiaotong University College of Materials Science and Engineering Yangtze Normal University School of Engineering Technology Purdue University

A pre-rolling(PR) process with a small pre-strain was applied along the transverse direction(TD) and the extrusion direction(ED) of non-basal and basal textured AZ61 Mg alloys at room temperature to investigate the induced twinning behavior. The microstructural evolution of the alloys was used to evaluate the grain-boundary effect in terms of the texture variation. The results demonstrated that■ extension twinning was introduced by the PR process and that the volume fraction of twins increased with increasing thickness reduction. The subdivision of grains via twinning induced grain reorientation that generated a prominent basal texture with the c-axis parallel to the normal direction(ND) after PR. The textured Mg alloy with this c-axis//TD feature can promote twinning activity. The twinning performance was critical to initiate plastic deformation, therefore to determine deformation behavior at room temperature. The deformation mechanism was also addressed related to the extension twin lamellae.

关键词： Mg alloy twin Grain orientation Texture

Achieving exceptional strength and ductility combination in a heterostructured Mg-Y alloy with densely refined twins

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Journal of Materials Science & Technology 2024年第22期189卷 132-145页

作者： Yuliang Yang Yuxin Liu Shuang Jiang Ye Yuan Weiye Chen Lifang Sun Zhufeng He Xiaoli Zhao Nan Jia Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China School of Material Science and Engineering North Minzu UniversityYinchuan 750021China

Metals and alloys with heterogeneous microstructures are an emerging class of materials that exhibit exceptional mechanical properties,owing to the novel scientific principle of hetero-deformation induced(HDI)strengthening and *** magnesium alloys,due to their low recrystallization temperature,poor ductility at room temperature,limited cold workability,and the tendency to generate strong basal texture during deformation,it is difficult to obtain heterostructures without relying on precipitation of the second ***,three heterostructured Mg-2.9Y(wt.%)materials with varying accumulative equivalent true strains,i.e.,5%-5 cycles,7.5%-5 cycles,and 10%-5 cycles materials were fabricated via applying five complete triaxial compression cycles to the bulk *** 5%-5 cycles material with an accumulative equivalent true strain of 0.37 is featured with long twin lamellae embedded in coarse *** the accumulative true strain increases to 0.72,a heterogeneous structure composed of long and short twin lamellae is formed inside the 7.5%-5 cycles *** the equivalent true strain further increases to 1.01,the 10%-5 cycles material exhibits a mixed structure with densely refined twin lamellae embedded in the coarse-grained *** room-temperature uniaxial tensile tests show that the yield strength of the materials processed by triaxial cyclic compression(TCC)has been significantly improved compared to that at the initial state,whereas ductility was not significantly sacrificed without the subsequent heat *** dense and refined twin lamellae that serve as hard domains in this material provide a high density of interfaces and impede dislocation motion *** results in significant HDI strengthening and *** findings provide new insight into the design of heterostructured hexagonal close-packed materials with both high strength and good ductility.

关键词： Heterostructure Magnesium alloy twin Hetero-deformation induced strengthening and hardening

Effects of different types of twinning on microstructure and mechanical properties of a strongly textured TA2 commercially pure titanium alloy subjected to rolling at ambient and cryogenic temperatures

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Journal of Iron and Steel Research International 2018年第3期25卷 275-281页

作者： Jin-ru Luo Xiao Song Mao-yin Wang Institute of Materials China Academy of Engineering Physics Mianyang 621908 Sichuan China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083 China

Strongly textured commercially pure titanium alloy TA2 plates with different initial textures have been rolled at cryogenic and ambient temperatures to 4% reduction and then post-annealed at 50℃ for 12 h. Microstructures of the samples were investigated using electron backscatter diffraction. The mechanical property of the sheets was tested via quasi-static uniaxial tensile tests along the rolling direction at room temperature. The effects of initial texture and rolling temperature on twin activity and mechanical property have been investigated. twinning is very active in TA2 titanium during rolling at either room or cryogenic temperature. {1122} contraction twins can be observed in all the sheets and are the dominant twin mode for the sheets with an initial texture having c-axes parallel to the normal direction （ND）. Extension twins have rarely been seen in sheets having an initial texture with c-axes parallel to ND, but play quite an important role in the sheets having an initial texture with c-axes perpendicular to ND. The initial texture of the sheet is considered to determine the twin mode while the cryogenic rolling temperature is found to increase the numbers of twins. Post-annealing does not change obviously the rolled microstructure. After annealing, the strength decreases and elongation to fracture slightly increases. The cryorolled sample has the better strength with little loss in elongation, and this mechanical enhancement is attributed to massive twinning.

关键词： Titanium Rolling twin Microstructure Mechanical property

Microstructural evolution and grain growth mechanism of pre-twinned magnesium alloy during annealing

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Journal of Magnesium and Alloys 2021年第4期9卷 1238-1251页

作者： Ye Jin Kim Jong Un Lee Young Min Kim Sung Hyuk Par School of Materials Science and Engineering Kyungpook National JJniversityDaegu 41566Republic of Korea Implementation Research Division Korea Institute of Materials ScienceChanson 51508Republic of Korea

The microstructural evolution and underlying grain growth mechanism of a{1012}-twin-containing Mg alloy during annealing are investigated through quasi in situ electron backscatter diffraction measurements of a rolled AZ31 alloy subjected to precompression along the rolling direction(RD).The precompressed material shows a partially twinned structure consisting of a twinned region and a residual matrix region,and this structure changes to an almost twin-free structure consisting of grown grains with serrated grain boundaries in twinand matrix-originated regions after annealing at 250℃ for 1 *** addition,the average grain size almost doubles and the internal strain energy decreases significantly after *** microstructural variations are induced mainly by grain growth through the strain-induced migration of high-angle grain boundaries without the movement of twin *** twinned region of the precompressed material has higher stored strain energy than the residual matrix region because the crystallographic orientation of the former region is favorable for basal slip and because of the occurrence of the dislocation transmutation reaction in the *** reducing the total strain energy accumulated in the precompressed material,the residual matrix region—having lower stored strain energy—preferentially grows while consuming the twinned regions formed in the surrounding grains during *** a result,the area fraction of grains with a matrix texture increases whereas that of grains with a twin texture decreases after *** twin texture intensity increases significantly and this texture becomes more concentrated along the RD because the highly RD oriented twins tend to grow during annealing on account of their fairly low stored strain energy.

关键词： Magnesium twin Annealing Grain growth Strain energy

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