检索结果-南通市图书馆

High density dislocations enhance creep ageing response and mechanical properties in 2195 alloy sheet

Journal of Central South University 2024年第7期31卷 2194-2209页

作者： WEI Shuo MA Pei-pei CHEN Long-hui YANG Jian-shi ZHAN Li-hua LIU Chun-hui Light Alloy Research Institute Central South UniversityChangsha 410083China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China School of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Advancd Research Center Central South UniversityChangsha 410083China Light Alloy Research

The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age ***,finding a solution to improve the creep formability of Al-Cu-Li alloy is vital.A thorough comparison of the effects of cryo-deformation and ambient temperature large pre-deformation(LPD)on the creep ageing response in the 2195 alloy sheet at 160℃with different stresses has been *** evolution of dislocations and precipitates during creep ageing of LPD alloys are revealed by X-ray diffraction and transmission electron ***-quality 2195 alloy sheet largely pre-deformed by 80%without edge-cracking is obtained by cryo-rolling at liquid nitrogen temperature,while severe edge-cracking occurs during room temperature *** creep formability and strength of the 2195 alloy are both enhanced by introducing pre-existing dislocations with a density over 1.4×10^(15)m^(−2).At 160℃and 150 MPa,creep strain and creep-aged strength generally increases by 4−6 times and 30−50 MPa in the LPD sample,respectively,compared to conventional T3 alloy *** elongation of creep-aged LPD sample is low but remains relevant for *** high-density dislocations,though existing in the form of dislocation tangles,promote the formation of refined T1 precipitates with a uniform dispersion.

关键词： creep ageing Al-Cu-Li alloy high dislocation density cryogenic rolling dislocation strengthening

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Improving the Mechanical and Tribological Properties of NiTi Alloys by Combining Cryo-rolling and Post-Annealing

引用

Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 317-325页

作者： Yong Wen Yan-Fei Wang Hao Ran Wei Wei Jun-Ming Zhang Chong-Xiang Huang School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China

By combining cryo-rolling and post-annealing treatments,the nanostructured NiTi alloy is produced.A diff erential scanning calorimetry measurement was used to test the eff ect of the preparation process on phase *** cryo-rolling changes the tensile fracture of NiTi alloy to a ductile ***,the recovered structure exhibits signifi cant strength improvement,while the tensile plasticity is still comparable to that of the coarse-grained *** optimized mechanical performance is due to the strengthening eff ect of refi ned microstructure and the high work hardening capability rendered by moderate dislocation ***-on-plate reciprocating dry-sliding wear test reveals that the nanostructured NiTi alloy also has enhanced wear resistance,which is primarily ascribed to the high content of residue martensite formed during *** results provide an eff ective route to optimize the mechanical and wear properties of NiTi alloys.

关键词： NiTi alloy Phase transformation Strength and ductility Wear resistance cryogenic rolling

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

Influence of bimodal non-basal texture on microstructure characteristics,texture evolution and deformation mechanisms of AZ31 magnesium alloy sheet rolled at liquid-nitrogen temperature

引用

镁合金学报(英文) 2023年第7期11卷 2600-2609页

作者： Shouzuo Zhang Li Hu Yutao Ruan Tao Zhou Qiang Chen Yang Zhong Laixin Shi Mingao Li Mingbo Yang Shuyong Jiang College of Material Science and Engineering Chongqing University of TechnologyChongqing 400054China Southwest Technology and Engineering Research Institute Chongqing 400039China School of Advanced Manufacturing Technologies Tomsk Polytechnic UniversityTomsk 634050Russia College of Material Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

cryogenic rolling experiments have been conducted on the AZ31 magnesium(Mg)alloy sheet with bimodal non-basal texture,which is fabricated via the newly developed equal channel angular rolling and continuous bending process with subsequent annealing(ECAR-CB-A)*** demonstrate that this sheet shows no edge cracks until the accumulated thickness reduction reaches about 18.5%,which is about 105.6%larger than that of the sheet with traditional basal *** experiments including optical microstructure(OM),X-ray diffractometer(XRD),and electron backscatter diffraction(EBSD)measurements are then performed to explore the microstructure characteristics,texture evolution and deformation mechanisms during cryogenic *** observations confirm the occurrence of abundant{10–12}extension twins(ETs),twin-twin interactions among{10–12}ET variants and{10–12}-{10–12}double twins(DTs).The twinning behaviors as for{10–12}ETs are responsible for the concentration of c-axes of grains towards normal direction(ND)and the formation of transverse direction(TD)-component texture at the beginning of cryogenic *** twinning behaviors with respect to{10–12}-{10–12}DTs are responsible for the disappearance of TD-component texture at the later stage of cryogenic *** involved deformation mechanisms can be summarized as follows:Firstly{10–12}ETs dominate the plastic ***,dislocation slip,especially basalslip,starts to sustain more plastic strain,while{10–12}ETs occur more frequently and enlarge continuously,resulting in the formation of twin-twin interaction among{10–12}ET *** the increasing rolling passes,{10–12}-{10–12}DTs incorporate in the plastic deformation and dislocation slip serves as the major one to sustain plastic *** activities of basalslip,{10–12}ETs and{10–12}-{10–12}DTs benefit in accommodating the plastic strain in sheet thickness,which contributes to the improved rolling formability

关键词： AZ31 Mg alloy Bimodal non-basal texture cryogenic rolling Microstructure evolution Deformation 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

Microstructures and Tensile Deformation Behavior of a cryogenic-rolled Mn-Al TRIP Steel

Microstructures and Tensile Deformation Behavior of a Cryoge...

引用

“第十届中国钢铁年会”暨“第六届宝钢学术年会”

作者： Hu Zhiping Xu Yunbo Tan Xiaodong Yang Xiaolong Peng Fei Yu Yongmei Liu Hui Wang Le The State Key Laboratory of rolling and Automation Northeastern University School of Mechanical Engineering Shenyang University of chemical technologyShenyang Economical & Technological Development Zone Research Institute of Iron and Steel of Shandong Iron and Steel Group

In this work,acryogenic rolling process was appliedto a 3Mn-1.5Al TRIP *** characterization was carried out by means of optical microscope,scanning electron microscope（SEM）equipped with electron probe microanalysis（EPMA）and transmission electron microscope（TEM）.Mechanical properties were obtained by uniaxial tension *** microstructure characterization results show that the steel presents a complex microstructure composed of three phases（ferrite,martensite and retained austenite）.The volume fractions of austenite before and after a deformation were determined by X-ray diffraction（XRD）.The XRD results indicate that the amount of retained austenite reaches up to18vol%and the TRIP effect occurs quite apparently in the specimen with optimizingintercritical annealing temperature of730°*** mechanical properties results displays that the tested steel presentsadequateultimate tensile strength of 916MPa and excellent elongation of 30%in the optimal intercriticalannealing *** retained austenite strain hardening behavior（continuous TRIP effect）is observed in the *** outstanding combination of strength and ductility with the product of strength and elongation（PSE）reaching up to 27GPa%around indicates that the steel has a bright application prospect.

关键词： cryogenic rolling Mn-Al TRIP steel microstructures and properties retained austenite

来源： cnki会议评论

在线全文

cnki会议

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

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

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：