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Nano-refinement of the face-centered cubic Zr(Fe,Cr)_(2)secondary phase particles in Zircaloy-4 alloy via localized-shearing/bending-driven fracture under high-temperature compression

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Journal of Materials Science & Technology 2023年第34期165卷 8-16页

作者： Fuzhou Han geping li Fusen Yuan Wenbin Guo Jie Ren Qichen Wang Yingdong Zhang Ali Muhammad Chengze liu Hengfei Gu Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China

Nanoparticles are extensively introduced to improve the mechanical,physical,and chemical properties of alloys.In the present study,the underlying nano-refinement mechanisms of face-centered cubic Zr(Fe,Cr)_(2)secondary phase particles(SPPs)that precipitated in Zircaloy-4 alloy under high-temperature compression were investigated in detail by utilizing high-resolution transmission electron microscopy(HRTEM)and conventional TEM techniques.The frequently observed Zr(Fe,Cr)_(2)SPPs were incoherent with the matrix and exhibited brittle fracture behaviors without measurable plasticity.HRTEM observations revealed two mechanisms underlying the nano-refinement of incoherent micro-sized SPPs via localized shear fracture on{11¯2}SPP and nanoprecipitate-assisted bending fracture,respectively.The latter was,for the first time,found to occur when the movements of large SPPs were blocked by nanometer-sized SPP during alloy deformation.Accordingly,two force models were proposed to visualize their potential nano-refinement processes.The knowledge attained from this study sheds new light on the deformation behaviors of Zr(Fe,Cr)_(2)SPPs and their associated size refinement mechanisms under high-temperature compression,and is expected to greatly benefit the process optimization of zirconium alloys to achieve precipitate nano-refinement.

关键词： Secondary phase particles Nano-refinement mechanism Shearing and bending fracture modes Zirconium alloys High-temperature compression

Deformation twinning in octahe dron-base d face-centere d cubic metallic structures:Localized shear-force dipoles drive atomic displacements

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Journal of Materials Science & Technology 2022年第31期126卷 116-126页

作者： Hengfei Gu Chengze liu Fusen Yuan Fuzhou Han Yingdong Zhang Muhammad Ali Wenbin Guo Jie Ren lifeng Zhang Songquan Wu geping li Institute of Metal Research Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China University of Science and Technology of China Hefei 230026China Institute of Molecular Plus Tianjin UniversityTianjin 300072China School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Twinning is found to impart favorable mechanical,physical and chemical properties to nanostructured materials.Deformation twinning prevails in face-centered cubic(FCC)nanocrystalline materials upon loading.In FCC structures,the{111}deformation twinning is traditionally believed to nucleate and grow through layer-by-layer emission of 1/6Shockley partial dislocations on consecutive{111}planes.We report that deformation twinning is able to occur in crystalline(Fe,Nb)_(23)Zr_(6)nanoparticles(NPs)that have a large Mn 23 Th 6-type FCC structure with a Zr-octahedron as a motif.Based on direct atomic-scale observations,we discover a new zero-net-strain path for the{111}deformation twin-ning in FCC structures.To form a[¯1¯12]/(111)twin,for example,short(¯1¯11)planes within two adjacent(111)plane layers in the repeated three-layer sequence of(111)planes are shear deformed continuously by a shear-force dipole along the[11¯2]direction like a domino effect,whereas the other(111)plane in the repeated sequence remains intact.In addition,a loading criterion for deformation twinning of a FCC NP under uniaxial compression is proposed based on our observations.Our work here not only extends the fundamental understanding on deformation twinning in FCC structures,but also opens up studies of deformation behaviors in a class of Mn 23 Th 6-type FCC materials.

关键词： deformation cubic dipole

Intermediate state of hexagonal close-packed structure to face-centered cubic structure transformation: Direct evidence for basal-type face-centered cubic phase via partial dislocation in zirconium

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Journal of Materials Science & Technology 2022年第3期98卷 44-50页

作者： Fusen Yuan Fuzhou Han Yingdong Zhang Ali Muhammad Wenbin Guo Jie Ren Chengze liu Hengfei Gu geping li Gaihuan Yuan Shi-changxu Innovation Center For Advanced Materials Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of China96 JinZhai RoadBaohe DistrictHefei 230026China University of Chinese Academy of Sciences 19 Yuquan RoadBeijing 100049China State Nuclear Bao Ti Zirconium Industry Company Baoji 721013China

1.Introduction Zirconium(Zr)and its alloys show great applications in nuclear and chemical industry thanks to their appropriate mechanical properties,low thermal neutron absorption cross-section and excellent corrosion resistance[1–3].Zr displays three different crystal structures on the temperature-pressure phase diagram:the hexagonal close-packed structure(HCP,α-Zr),the body centered cubic structure(BCC,β-Zr)and the simple hexagonal structure(ω-Zr).

关键词： transformation corrosion hexagonal

Surface Microcracks and Relief Caused by Lamella Sliding during High Temperature Tension of Titanium Alloy with Lamella Structure

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Journal of Materials Science & Technology 2006年第4期22卷 470-472页

作者： Feng XU geping li Mesut VARliOGLU Philip NASH Rui YANG Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Illinois Institute Technology Thermal Processing Technology Center Chicago IL USA

张力的样品的破裂附近的侧面的表面被在氧化物电影搬迁前后扫描电子显微镜学(SEM ) 检验。在表面形态学和微观结构之间的关系被建立。微裂缝被表面氧化物的易碎物破裂引起的结果表演由于高山拍摄哈薄片沿着高山滑动哈薄片边界。并且滑... 详细信息

张力的样品的破裂附近的侧面的表面被在氧化物电影搬迁前后扫描电子显微镜学(SEM ) 检验。在表面形态学和微观结构之间的关系被建立。微裂缝被表面氧化物的易碎物破裂引起的结果表演由于高山拍摄哈薄片沿着高山滑动哈薄片边界。并且滑动排列高山哈薄片相对优先的样品表面带给微快克形成而且殖民地的加薪不仅。A 滑倒模型，描绘在表面形态学和微观结构之间的关系，向前被带分析观察。

关键词：钛合金薄层构造表面裂纹高温应力

The influence of microtexture on the formation mechanism of nodules in Zircaloy-4 alloy tube

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Journal of Materials Science & Technology 2020年第12期47卷 68-75页

作者： Yingdong Zhang Fusen Yuan Fuzhou Han Muhammad Ali Wenbin Guo geping li Chengze liu Hengfei Gu Institute of Metal Research Chinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of China96 JinZhai RoadBaohe DistrictHefeiAnhui 230026China University of Chinese Academy of Sciences 19 Yuquan RoadBeijing 100049China

Corrosion re sistance of Zircaloy-4 alloy tube in superheated steam at 673 K/10.3 MPa is anisotropic.A part of the surface undergoes uniform corrosion while the other suffers nodular corrosion.Narrow and wide nodules are observed after an exposure period of 3 and 30 days,respectively.A new matrix transformation method is established in order to study the formation mechanism of nodules in the cross-section(CS) of Zircaloy-4 alloy tube using the EBSD technique,while the CS perpendicular to axial direction(AD).The results reveal that the microtexture is a key factor behind the two types of corrosion.Furthermore,the oxide layers grow anisotropically over the corroded surface.A thick oxide layer forms over the nodular corrosion region on the grains with c-axis oriented in the range of 40° around tangential direction(TD),whereas a thin oxide layer over the uniform corrosion region is detected on the grains with c-axis oriented in the range of 68° around TD.In short,the anisotropic growth of oxide layer was caused by the change of microtexture of the Zr-4 alloy tube,and this anisotropic growth of oxide layer contributed to the nodules formation.

关键词： Zircaloy-4 alloy Microtexture Nodular corrosion EBSD technique Matrix transformation method

A new type face-centered cubic zirconium phase in pure zirconium

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Journal of Materials Science & Technology 2021年第22期81卷 236-239页

作者： Fusen Yuan geping li Fuzhou Han Yingdong Zhang Ali Muhammad Wenbin Guo Jie Ren Chengze liu Hengfei Gu Gaihuan Yuan Shi-changxu Innovation Center For Advanced Materials Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang110016PR China School of Materials Science and Engineering University of Science and Technology of China96 JinZhai RoadBaohe DistrictHefeiAnhui230026PR China University of Chinese Academy of Sciences 19 Yuquan RoadBeijing100049PR China State Nuclear Bao Ti Zirconium Industry Company Baoji721013PR China

So far,only two orientation relationships(OR)between hexagonal close-packed(HCP)(αphase)and facecentered cubic(FCC)structures in zirconium and titanium alloys have been reported.Here a new type FCC phase(named γ phase)with OR:_(α)‖_(γ) and{0001}_(α)‖{002}_(γ) was observed for the first time in annealed pure zirconium by means of transmission electron microscopy(TEM)technique.The α→γ phase transformation can be accomplished via expansion along[1■00]direction and slip of Shockley partial dislocation with 1/3[1■00]on(0001)basal planes.

关键词： FCC phase Orientation relationship Phase transformation

FREM2基因变异致隐眼畸形1例胎儿的遗传学分析

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中华医学遗传学杂志 2024年第5期41卷 606-611页

作者：陈弘大李闪高劲松崔歌平杨涛赵秀丽中国医学科学院基础医学研究所-北京协和医学院基础学院医学遗传学系疑难重症及罕见病全国重点实验室北京100005 中国医学科学院北京协和医学院北京协和医院妇产科、国家妇产疾病临床医学研究中心北京100730

目的探讨1例经超声检出的隐眼畸形胎儿的遗传学病因。方法以2017年1月因超声提示面部发育异常行药物引产的1例无双侧眼裂胎儿(先证者)作为研究对象,回顾性分析孕妇的临床资料。采集引产胎儿的脐带血及家系成员外周血样,提取基因组DNA,... 详细信息

目的探讨1例经超声检出的隐眼畸形胎儿的遗传学病因。方法以2017年1月因超声提示面部发育异常行药物引产的1例无双侧眼裂胎儿(先证者)作为研究对象,回顾性分析孕妇的临床资料。采集引产胎儿的脐带血及家系成员外周血样,提取基因组DNA,通过全外显子组测序(WES)确定致病性候选变异,用Sanger测序进行家系验证,结合生物信息学分析和蛋白结构模拟进行致病性分析。根据结果为该家系进行进一步的产前基因诊断。结果先证者母亲既往曾有4次不良妊娠史。本次引产胎儿为第5胎,其双侧上下眼睑融合,切开后可见发育不良的眼球,角膜与上眼睑粘附,低位耳,足底前部纹理异常,拟诊为隐眼畸形,尚无文献报道这2个变异与隐眼畸形的关联。基因测序结果提示胎儿存在FREM2基因c.4537G>A(p.D1513N)和c.7292C>T(p.T2431M)复合杂合变异。蛋白结构模拟显示二者均可造成蛋白氨基酸之间氢键的改变。根据美国医学遗传学与基因组学学会(ACMG)相关指南,二者均被判定为可能致病性变异(PM1_Supporting+PM2_Supporting+PM5+PP3+PP4;PM2_Supporting+PM3+PP3+PP4)。孕妇第6次妊娠时接受了针对性的基因检测,并娩出一表型正常的胎儿。结论FREM2:c.4537G>A和c.7292C>T复合杂合变异可能是该家系隐眼畸形胎儿的遗传学病因。该2个新变异的检出扩展了FREMI的致病变异谱。

关键词：眼畸形 FREM2基因隐眼畸形复合杂合变异全外显子组测序产前诊断

{332}<113> Twinning transfer behavior and its effect on the twin shape in a beta-type Ti-23.1Nb-2.0Zr-1.0O alloy

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Journal of Materials Science & Technology 2021年第32期91卷 58-66页

作者： Yi Yang Bohua Zhang Zhichao Meng Lei Qu Hao Wang Sheng Cao Jianan Hu Hao Chen Songquan Wu Dehai Ping geping li Lai-Chang Zhang Rui Yang Aijun Huang School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Northwest Institute for Non-ferrous Metal Research Xi’an 710016China School of Materials University of ManchesterOxford RoadManchester M139PLUnited Kingdom National Institute for Materials Science Sengen 1-2-1Tsukuba 305-0047Japan School of Engineering Edith Cowan University270 Joondalup DriveJoondalupPerthWA6027Australia Department of Materials Science and Engineering Monash UniversityClaytonVIC 3800Australia

The interaction between twins and grain boundaries(GB) has an important influence on the deformation and fracture behavior of materials. In the present work, {332} twinning transfer(TT) behavior and its effect on the twin shape in a deformed β-type Ti-23.1 Nb-2.0 Zr-1.0 O Ti alloy were investigated experimentally and with molecular dynamics simulation. The crystallographic alignment factor of the two twinning systems in the neighboring grains and the misorientation angle of the grain pairs were found to influence the occurrence of TT. This further determines the twin shape: twins present a ruler shape when TT occurs but are in a lenticular shape otherwise. Such different twin shapes are attributed to the local stress states related to TT occurring or not. Both ruler-shaped paired twinning and lenticular twinning would provide effective mechanisms to release or reduce the stress concentration in front of the twin tips in different grain pairs.

关键词： Titanium alloys Plastic deformation Grain boundaries Twinning Twin shape

Stabilizing electrode-electrolyte interface for high-performance SiO_(x) anode by dual electrolyte additive

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Journal of Energy Chemistry 2023年第11期86卷 32-40,I0002页

作者： Renlong li Binghan Cui Qingjie Zhou Xue Mu Yunzhi Gao geping Yin Chuankai Fu Pengjian Zuo MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

Macro-and micro-interface instability of SiO_(x)anode caused by its dramatic volume variation during cycling will result in low Coulombic efficiency and rapid capacity degradation.In this work,an organic-inorganic composite interfacial layer rich in benzene ring groups,polyisocyanates,and liF was obtained on SiO_(x)anode by the introduction of 4-fluorophenyl isocyanate(FPI)and fluoroethylene carbonate(FEC)co-additives in electrolyte.The SiO_(x)anode material shows a capacity retention of 69.2%after 100 cycles at a current density of 1 A g^(-1)and rate capacity of 523 m A h g^(-1)at the current density of 3A g^(-1),while the SiO_(x)anode cycling in reference electrolyte has almost no capacity.

关键词： lithium-ion batteries SiO_(x) anode SEI film Electrolyte additive Interfacial stability