检索结果-南通市图书馆

Achieving High Strength and Tensile Ductility in Pure Nickel by Cryorolling with Subsequent Low-Temperature Short-Time Annealing

引用

Engineering 2024年第2期33卷 190-203页

作者： Zhide Li Hao Gu Kaiguang Luo charlie kong Hailiang Yu Light Alloys Research Institute Central South UniversityChangsha 410083China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Electron Microscope Unit University of New South WalesSydneyNSW 2052Australia

Ultra fine-grained pure metals and their alloys have high strength and low *** this study,cryorolling under different strains followed by low-temperature short-time annealing was used to fabricate pure nickel sheets combining high strength with good *** results show that,for different cryorolling strains,the uniform elongation was greatly increased without sacrificing the strength after annealing.A yield strength of 607 MPa and a uniform elongation of 11.7%were obtained after annealing at a small cryorolling strain(ε=0.22),while annealing at a large cryorolling strain(ε=1.6)resulted in a yield strength of 990 MPa and a uniform elongation of 6.4%.X-ray diffraction(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM),and electron backscattered diffraction(EBSD)were used to characterize the microstructure of the specimens and showed that the high strength could be attributed to strain hardening during cryorolling,with an additional contribution from grain refinement and the formation of dislocation *** high ductility could be attributed to annealing twins and micro-shear bands during stretching,which improved the strain hardening *** results show that the synergistic effect of strength and ductility can be regulated through low-temperature short-time annealing with different cryorolling strains,which provides a new reference for the design of future thermo-mechanical processes.

关键词： Cryorolling Annealing Nickel Strain hardening Ductility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

深冷轧制与时效处理提升2195铝锂合金腐蚀性能机理(英文)

引用

Transactions of Nonferrous Metals Society of China 2024年

作者：肖岳王文帅 Waqas Farid 张立华 charlie kong 喻海良中南大学极端服役性能精准制造全国重点实验室 Mark Wainwright Analytical Centre， University of New South Wales 中南大学轻合金研究所

通过透射电子显微镜、扫描电子显微镜、光学显微镜、晶间腐蚀实验和电化学实验等研究了深冷轧制、室温轧制及其后续人工时效对2195铝锂合金腐蚀性能的影响。在时效处理的不同阶段，深冷轧制和室温轧制2195铝锂合金均呈现“点蚀-晶间腐蚀... 详细信息

通过透射电子显微镜、扫描电子显微镜、光学显微镜、晶间腐蚀实验和电化学实验等研究了深冷轧制、室温轧制及其后续人工时效对2195铝锂合金腐蚀性能的影响。在时效处理的不同阶段，深冷轧制和室温轧制2195铝锂合金均呈现“点蚀-晶间腐蚀-点蚀”的腐蚀模式，二者的腐蚀速率均呈现先增大后逐渐稳定的趋势。T1相的尺寸与密度对合金的腐蚀性能产生了重要影响，在峰时效与过时效阶段，更细小的T1相使得深冷轧制样品的耐腐蚀性能更优。

关键词： 2195铝锂合金深冷轧制时效处理腐蚀性能

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

深冷轧制在提高Al-Mg-Mn-Sc合金板材腐蚀性能中的作用(英文)

引用

Transactions of Nonferrous Metals Society of China 2024年

作者：顾昊贾帅广李智德高海涛王正宇 charlie kong 喻海良中南大学极端服役性能精密制造国家重点实验室中南大学机电工程学院中南大学轻合金研究院岛津(中国)有限公司 Electron Microscope Unit， University of New South Wales

通过调控轧制温度可以实现铝合金服役性能的提高。深冷轧制工艺提高了Al-Mg-Mn-Sc合金板材的腐蚀性能。相比室温轧制样品，深冷轧制50%的样品表现出比室温轧制样品更好的耐蚀性。敏化处理后，深冷轧制样品的最大晶间腐蚀深度为35.2 μm... 详细信息

通过调控轧制温度可以实现铝合金服役性能的提高。深冷轧制工艺提高了Al-Mg-Mn-Sc合金板材的腐蚀性能。相比室温轧制样品，深冷轧制50%的样品表现出比室温轧制样品更好的耐蚀性。敏化处理后，深冷轧制样品的最大晶间腐蚀深度为35.2 μm，而室温轧制样品的最大晶间腐蚀深度为53.9 μm。同样，两个样品的质量损失分别为6.89和73.11mg/cm2。此外，深冷样品的阻抗模量是室温轧制样品的2倍以上。深冷轧制样品中更厚的钝化膜，更加细小分散的Al6（Mn， Fe）相使其具有更好的耐点蚀性能。深冷轧制样品中的亚晶粒、剪切带、分散的Al3（Sc， Zr）相、更少的大角度晶界和更高密度的位错都阻碍了β (Al3Mg2)相在晶界的连续析出，并在晶内形成β相。这些微观特征降低了β相与铝基体之间的电耦合效应，显著减少了晶间腐蚀的发生。本研究填补了深冷轧制和室温轧制对Al-Mg-Mn-Sc合金腐蚀性能影响对比研究的空白。为提高该合金的耐腐蚀性能奠定了理论基础。

关键词： Al-Mg-Mn-Sc合金深冷轧制腐蚀性能微观组织晶粒尺寸第二相

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Low-temperature superplasticity of cryorolled Ti-6Al-4V titanium alloy sheets

引用

钨科技(英文) 2023年第4期5卷 522-530页

作者： Fei-Long Yu charlie kong Hai-Liang Yu State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha410083China Light Alloy Research Institute Central South UniversityChangsha410083China Mark Wainwright Analytical Centre University of New South WalesSydneyNSW2052Australia

To investigate the superplastic deformation behavior of cryorolled Ti-6Al-4V titanium alloy,tensile tests were carried out at760℃and 830℃with different strain *** evolution of grain and micro structure has been studied using transmission electron microscopy and electron backscatter *** the tensile temperature was 760℃(<0.5T_(m),T_(m)is absolute melting point of alloy.)and the strain rate was 5×10^(-4)s^(-1),the fracture elongation of the sample reached 385%,showing good low-temperature *** with the tensile temperature of 760℃,the fracture elongation of the s ample at 830℃was lower due to grain coarsening and *** strain rate sensitivity value m of all samples was larger than0.3,which confirmed that the cryorolled Ti-6A1-4V titanium alloy with a non-equiaxed grains structure can achieve high superplasticity at a temperature lower than 0.5T_(m),and indicated that the main deformation mechanisms in the tensile test at760-830℃were grain rotation and grain boundary *** the tensile test,the average grain size of all samples was less than 5μm,in which significant dynamic recrystallization and recovery occurred.

关键词： Ti-6Al-4V alloy Cryorolling Non-equiaxed grains structure Superplasticity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Suppressing Al2O3 nanoparticle coarsening and Cu nanograin growth of milled nanostructured Cu-5vol.%Al2O3 composite powder particles by doping with Ti

引用

Journal of Materials Science & Technology 2017年第11期33卷 1323-1328页

作者： Dengshan Zhou Hongwei Geng Wei Zeng Deliang Zhang charlie kong Paul Munroe Key LaboratoryforAnisotropy and Texture of Materials (Ministry of Education) Northeastern University Shenyang 110819 China Institute of Ceramics and Powder Metallurgy School of Materials Science and Engineering Northeastern University Shenyang 110819 China Waikato CentreforAdvanced Materials School of Engineering The University of Waikato Private Bag3105 Hamilton New Zealand State Key Laboratory for Metal Matrix Materials School of Materials Science and Engineering Shanghaifiao Tong University Shanghai 200240 China Electron Microscopy Unit The University of New South Wales Sydney 2052 Australia School of Materials Science and Engineering The University of New South Wales Sydney 2052 Australia

Both the coarsening of Al2O3 nanoparticles and the growth of Cu nanograins of mechanically milled nanostructured Cu-5 vol.%Al2O3 composites with, and without, trace amounts of Ti during annealing at973 K for 1 h were investigated. It was found that doping with a small amount of Ti（e.g. 0.2 wt%） in a nanostructured Cu-5 vol.%Al2O3 composite effectively suppressed the coarsening of Al2O3 nanoparticles during exposure at this temperature. Further, the Ti addition also prevented the concomitant abnormal growth of the copper grains normally caused by the coarsening of the Al2O3 nanoparticles. Energy dispersive X-ray spectroscopy analysis of the Al2O3 nanoparticles in the annealed Cu-5 vol.%Al2 O3-0.2 wt%Ti sample suggested that the Ti atoms either diffused into the Al2O3 nanoparticles or segregated to the Cu/Al2O3 interfaces to form Ti-doped Al2O3 nanoparticles, which was more stable than Ti-free Al2O3 nanoparticles during annealing at high homologous temperatures.

关键词： Nanostructured copper matrix composites Minor alloying Annealing Grain growth Particle coarsening

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhanced Mechanical Properties of AA5083 Matrix Composite via Introducing Al_(0.5)CoCrFeNi Particles and Cryorolling

引用

Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 879-889页

作者： Hao Gu Zhide Li Kaiguang Luo Laxman Bhatta Hanqing Xiong Yun Zhang charlie kong Hailiang Yu State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Mark Wainwright Analytical Center University of New South WalesSydneyNSW 2052Australia Light Alloys Research Institute Central South UniversityChangsha 410083China

High-entropy alloy particles(HEAPs)can markedly enhance the mechanical properties of metal matrix composites(MMCs).In this study,AA5083/Al_(0.5) CoCrFeNi HEAPs MMCs with diff erent HEAPs contents(0,1,and 3 wt%)were prepared via a stir-casting,and then these MMCs sheets were hot rolled(573 K)and cryorolled(77 K),*** mechanical properties of the MMCs sheets were measured by tensile testing and microhardness ***,their microstructures were analyzed by scanning electron microscopy and transmission electron *** revealed that the ultimate tensile strength(UTS)of the as-cast AA5083/Al_(0.5) CoC rF eN i HEAPs MMCs were improved from 203 to 257 MPa by adding 3 wt%*** the mechanical properties of the MMCs sheets were improved after *** cryorolling with 50%rolling reduction ratio,the MMCs with 1 wt%HEAPs had an UTS of 382 MPa,which was 1.9 times that of the MMCs before ***,the strengthening mechanisms of HEAPs and cryorolling on the AA5083/HEAPs MMCs were discussed.

关键词： Metal matrix composite Cryorolling Mechanical properties High-entropy alloy particle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fabrication and Characterization of High-Bonding-Strength Al/Ti/Al-Laminated Composites via Cryorolling

引用

Acta Metallurgica Sinica(English Letters) 2020年第6期33卷 871-880页

作者： Juan Liu Yuze Wu Lin Wang Hui Wang charlie kong Alexander Pesin Alexander PZhilyaev Hailiang Yu State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Light Alloys Research Institute Central South UniversityChangsha 410083China Research Center for Advanced Science and Technology The University of TokyoMeguroTokyo 1530041Japan Mark Wainwright Analytical Centre University of New South WalesSydneyNSW 2052Australia Laboratory of Mechanics of Gradient Nanomaterials Nosov Magnitogorsk State Technical UniversityMagnitogorskRussia 455000

Sandwich-like Al/Ti/Al-laminated composites have many advantages such as low density and high specific strength with value in mechanical manufacturing and aerospace engineering. Here, Al/Ti/Al-laminated composites were fabricated by hot roll bonding and subsequent processes: cryorolling(-190 ℃ and-100 ℃), cold rolling(25 ℃), and hot rolling(300 ℃). Their bonding strength and mechanical properties were then studied by an Autograph AGS-X universal electronic testing machine. The results show that cryorolling can improve the interface bonding strength and tensile strength of Al/Ti/Allaminated composites. For the Al/Ti/Al-laminated composites subjected to cryorolling at-100 ℃, they have the highest strength near 260 MPa—this is 48 MPa and 41 MPa higher than the laminated composites subjected to cold and hot rolling, respectively. These results also show the strongest peeling strength. Finally, the mechanisms of the enhancement of bonding strength and mechanical properties of Al/Ti/Al-laminated composites subjected to cryorolling were mainly discussed.

关键词： Laminated composites Cryorolling Bonding strength Peeling strength Mechanical property Bonding mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

轧制(热轧,冷轧,深冷轧制)复合法制备轻质金属层状带材研究进展

引用

Transactions of Nonferrous Metals Society of China 2023年第2期33卷 337-356页

作者：高海涛 charlie kong 喻海良中南大学机电工程学院长沙410083 中南大学高性能复杂制造国家重点实验室长沙410083 中南大学轻合金研究院长沙410083 Mark Wainwright Analytical Centre University of New South WalesSydneyNSW 2052Australia

由于兼具多种材料的综合优势,金属层状复合板得到了广泛关注。轧制复合法具有可稳定连续生产的优势,已成为目前制备金属层状复合板的主要方法之一。本文介绍轧制复合金属层状复合板的研究进展,主要包括热轧复合法、冷轧复合法、累积叠... 详细信息

由于兼具多种材料的综合优势,金属层状复合板得到了广泛关注。轧制复合法具有可稳定连续生产的优势,已成为目前制备金属层状复合板的主要方法之一。本文介绍轧制复合金属层状复合板的研究进展,主要包括热轧复合法、冷轧复合法、累积叠轧法和深冷轧制复合法。系统地讨论金属层状复合板的界面形成机理及影响界面结合质量的主要因素,并对高性能金属层状复合板未来发展方向提出指导性的展望。

关键词：金属层状复合板轧制复合法结合界面力学性能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

深冷异步轧制及退火处理对CrCoNi中熵合金微观结构演变和力学性能影响

引用

塑性工程学报 2021年第5期28卷 35-43页

作者：张朝阳 kong charlie 喻海良中南大学高性能复杂制造国家重点实验室湖南长沙410083 中南大学机电工程学院湖南长沙410083 中南大学轻合金研究院湖南长沙410083 新南威尔士大学马克温锐分析中心悉尼2052

采用1.0、1.2、1.4和1.6的轧制异速比对高温退火Cr Co Ni中熵合金进行室温和深冷异步轧制,并对轧后的材料在873、973和1073 K退火处理0.5 h。采用透射电子显微镜对轧制态样品进行微观表征,发现轧制态合金晶粒尺寸随着异速比增加而减小,... 详细信息

采用1.0、1.2、1.4和1.6的轧制异速比对高温退火Cr Co Ni中熵合金进行室温和深冷异步轧制,并对轧后的材料在873、973和1073 K退火处理0.5 h。采用透射电子显微镜对轧制态样品进行微观表征,发现轧制态合金晶粒尺寸随着异速比增加而减小,且存在明显的孪晶。室温异步轧制实验显示,轧制后轧制态和退火态合金的抗拉强度均随着轧制异速比的增加而增加。深冷轧制制备的材料具有比室温轧制更高的强度,但深冷轧制过程异速比对材料强度影响不明显。在深冷异步轧制过程中,由于内应力和轧制缺陷的累积使得异速比强化有一定的饱和度。采用场发射扫描电子显微镜对拉伸试样的断口形貌进行表征,发现室温异步轧制后合金具有明显的韧窝,而深冷异步轧制韧窝相对较浅,为剪切断裂。

关键词：深冷异步轧制 CrCoNi中熵合金异速比孪晶

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

轧制及时效对AA6061深冷力学性能的影响

引用

塑性工程学报 2021年第5期28卷 76-83页

作者：刘粤赵祥帅 kong charlie 喻海良中南大学高性能复杂制造国家重点实验室湖南长沙410083 中南大学机电工程学院湖南长沙410083 中南大学轻合金研究院湖南长沙410083 新南威尔士大学马克温锐分析中心悉尼2052

采用冷轧和低温时效工艺制备了AA6061带材,测试了带材在室温和深冷温度(-100℃)下的拉伸力学性能。利用扫描电子显微镜、X射线衍射和透射电子显微镜分析了带材的微观组织。结果表明,轧制压下率为50%、120℃时效30 h的带材,其深冷拉伸极... 详细信息

采用冷轧和低温时效工艺制备了AA6061带材,测试了带材在室温和深冷温度(-100℃)下的拉伸力学性能。利用扫描电子显微镜、X射线衍射和透射电子显微镜分析了带材的微观组织。结果表明,轧制压下率为50%、120℃时效30 h的带材,其深冷拉伸极限抗拉强度与室温拉伸极限抗拉强度的最大差值为37.7 MPa,最小差值为140℃时效30 h时的2.1 MPa。随着时效时间的延长,深冷性能先增加后降低。试样在140℃下的整体性能低于120℃,这是由于材料出现了过时效。随着轧制压下率、时效时间和温度的增加,材料的晶格摩擦应力、位错强化和析出强化逐渐接近极限值,室温拉伸试样与深冷拉伸试样的强度差逐渐减小。

关键词： AA6061带材轧制时效深冷析出强化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：