检索结果-南通市图书馆

Graphene enables equiatomic FeNiCrCoCu high-entropy alloy with improved twip and TRIP effects under shock compression

引用

Journal of Materials Science & Technology 2024年第3期170卷 186-199页

作者： Hongcai Xie Zhichao Ma Wei Zhang Hongwei Zhao Luquan Ren School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130025China Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin UniversityChangchun 130025China Key Laboratory of Bionic Engineering Ministry of Education Jilin UniversityChangchun 130025China Weihai Institute for Bionics-Jilin University Weihai 264400China Institute of Structured and Architected Materials Liaoning Academy of MaterialsShenyang 110167China

Graphene(Gr)reinforced high-entropy alloy(HEA)matrix composites are expected as potential candidates for next-generation structural applications in light of outstanding mechanical properties.A deep comprehension of the underlying deformation mechanisms under extreme shock loading is of paramount importance,however,remains lacking due to experimentally technical limitations in *** the present study,by means of nonequilibrium molecular dynamics simulations,dynamic deformation behaviors and corresponding mechanisms in equiatomic FeNiCrCoCu HEA/Gr composite systems were investigated in terms of various shock *** resistance to dislocation propagation imparted by Gr was corroborated to encourage the elevated local stress level by increasing the likelihood of dislocation interplays,which facilitated the onset of twins and hexagonal close-packed(HCP)martensite ***,the advent of Gr was demonstrated to endow the HEA with an additional twinning pathway that induced a structural conversion from HCP to parent face-centered cubic(FCC)inside HCP martensite laths,different from the classical one that necessitated undergoing the intermediate procedure of extrinsic stacking fault(ESF)*** than that,by virtue of an increase in flow stress,the transformation-induced plasticity(TRIP)effect was validated to be additionally evoked as the predominant strain accommodation mechanism at higher strains on the one hand,but which only assisted plasticity in pure systems,and on the other hand,can also act as an auxiliary regulation mode together with the twinning-induced plasticity(twip)effect under intermediate strains,but with enhanced contributions relative to pure *** may expect that TRIP and twip effects promoted by introducing Gr would considerably inspire a synergistic effect between strength and ductility,contributing to the exceptional shock-resistant performance of FeNiCrCoCu HEAs under extreme regimes.

关键词： Molecular dynamics High-entropy alloy Graphene TRIP twip Shock

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

Effects of High Strain Rate on Properties and Microstructure Evolution of twip Steel Subjected to Impact Loading

引用

Journal of Iron and Steel Research International 2010年第6期17卷 67-73页

作者： LI Da-zhao WEI Ying-hui LIU Chun-yue HOU Li-feng LIU Dong-feng JIN Xian-zhe College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi China College of Materials Science and Engineering North University of China Taiyuan 030051 Shanxi China Technical Center Taiyuan Iron and Steel (Group) Company LTD Taiyuan 030004 Shanxi China

The mechanical properties of the twip steel subjected to impact loading at various strain rates were analyzed by the split Hopkinson pressure bar. Meanwhile the microstructure of the twip steel fore-and-aft dynamic deformation was oberseved and analyzed by optical microscope （OM）, X-ray diffraction （XRD）, and transmission electron microscope （TEM）. The results show that when the twip steel was deformed under dynamic condition, the stress, microhardness and work hardening rate increase with the increase of strain and strain rate; there is decline of work hardening rate for adiabatic temperature rising softening. There are many pin-like deformation twins in the microstructure of the twip steel subjected to impact loading, and the grain size after deformation is bigger than that before; the interaction of twins with dislocation and twins with twins, especially emergence of multiple deformation twins are the main strengthening mechanisms of the twip steel. The nucleation mechanism of deformation twins will be ＂rebound mechanism＂;the incomplete deformation twins can be observed when the strain rate is low; when strain rate increases, deformation twins unite together;and deformation twins become denser because the nucleation rate increases with increasing the strain rate.

关键词： twip split Hopkinson pressure bar deformation twin strain rate work hardening

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

Microstructure and Texture Evolution of Fe-33Mn-3Si-3Al twip Steel on Strain

引用

Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 176-182页

作者： HU Yangyang SU Yu Schoole of Materials Engineering Shanghai University of Engineering Science

The microstructure and texture evolution of Fe-33Mn-3Si-3Al twinning induced plasticity(twip) steel were studied by the scanning electron microscope(SEM) and X-ray diffraction(XRD) at room temperature. After quasi-static tensile, the texture evolution of different strain was observed. It was shown that the Goss and Brass components increased within the strain range of less than 0.6. Whereas, the main components were decreased when the strain levels were greater than 0.6. This behavior was attributed to the low stacking fault energy(SFE) and was related to the strain energy of this high manganese steel. At high strain levels, the high strain energy may contribute to the Brass components transition to the A(rot-Brass) components.

关键词： strain microstructure texture evolution twip steel strain energy

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 Mechanical Properties of Fe-Mn-(Al, Si) TRIP/twip Steels

引用

Journal of Iron and Steel Research International 2006年第6期13卷 66-70页

作者： DING Hua TANG Zheng-You LI Wei WANG Mei SONG Dan College of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China Continuous Casting Center Central Iron and Steel Research Institute Beijing 100081 China

The mechanical properties and microstructure of two low carbon high manganese steels with 23.8% （No. 1） and 33% （No. 2）（mass percent） of manganese were investigated. The results showed that No. 1 steel possesses high strength and high plasticity, and No. 2 steel has a relatively high strength and extraordinary plasticity. The No. 1 steel exhibits both TRIP （transformation induced plasticity） and twip （twin induced plasticity） effects during the deformation; while only twip effect appeared under the same deformation condition for No. 2 steel. The comparison between the microstructures and mechanical properties of two steels was made, and the strengthening mechanisms were also analyzed.

关键词： manganese TRIP twip microstructure mechanical property

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

Effects of Pre-strain and Temperature on Bake Hardening of twip900CR Steel

引用

Journal of Iron and Steel Research International 2015年第4期22卷 361-365页

作者： Suleyman KILIC Fahrettin OZTURK Tayfun SIGIRTMAC Gokhan TEKIN Department of Mechanical Engineering AhiEvran University Department of Mechanical Engineering The Petroleum Institute The Coskunz Metal Form

The effects of pre-strain and baking temperature on bake hardening behaviour of twip900CR steel were investi- gated. The results reveal that the bake hardening process contributes to an increase in yield strength up to 65 MPa at the baking temperature of 200 ℃. The difference in yield strength between baking temperatures of 170 and 200 ℃ is al- most insignificant. It is clearly observed that baking at a high temperature does not result in a significant increase in yield strength. For a reasonable bake hardening, a good combination of pre strain and baking temperature is necessa- ry. Besides, the toughness of the material is found to decrease with increasing pre-strain.

关键词： twinning-induced plasticity steel twip bake hardening strain hardening toughness

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

Fe16 Mn0.6C twip钢流变应力和临界动态再结晶行为

引用

钢铁研究学报 2009年第12期21卷 43-48页

作者：林长青梁高飞方园张小农于艳上海交通大学材料科学与工程学院上海200240 宝钢研究院前沿技术研究所上海201900

利用Thermecmastor—Z热模拟试验机，得到了Fe16Mn0．6Ctwip钢在变形温度850～1150℃，应变速率0．03～30s^-1条件下热压缩变形的真应力应变曲线。进而研究了变形温度、应变速率对Fe16Mn0．6C钢流变应力和临界动态再结晶行为的影响规律... 详细信息

利用Thermecmastor—Z热模拟试验机，得到了Fe16Mn0．6Ctwip钢在变形温度850～1150℃，应变速率0．03～30s^-1条件下热压缩变形的真应力应变曲线。进而研究了变形温度、应变速率对Fe16Mn0．6C钢流变应力和临界动态再结晶行为的影响规律。结果表明，850～1150℃范围内Fe16Mn0．6C钢热变形的峰值应力随温度的升高而降低，随着应变速率的增大而升高；且在应变速率为0．03S^-1和30S^-1出现明显的应力峰值，材料发生了动态再结晶。最后采用线性回归方法计算出Fe16Mn0．6C钢的高温变形流变应力本构方程，得出热变形激活能为469kJ／mol,并通过应变硬化速率与流变应力曲线求出了该钢种动态再结晶临界条件与Z参数之间的关系。

关键词：高锰钢 twip 热变形流变应力本构方程

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

twip钢拉伸变形微观组织的分析

引用

材料导报 2016年第S1期 502-504页

作者：张贵杰杨洋夏亮亮齐建军华北理工大学冶金与能源学院现代冶金技术重点实验室石家庄钢铁有限责任公司

对Fe-C-Mn系twip钢进行室温拉伸实验来测试力学性能,利用光学显微镜对金相组织进行观察,使用SEM对拉伸断口形貌进行观察。通过透射电镜对变形后的微观组织进行观察。结果表明:Fe-C-Mn系twip钢表现出优异力学性能,延伸率为47.14%,抗拉强... 详细信息

对Fe-C-Mn系twip钢进行室温拉伸实验来测试力学性能,利用光学显微镜对金相组织进行观察,使用SEM对拉伸断口形貌进行观察。通过透射电镜对变形后的微观组织进行观察。结果表明:Fe-C-Mn系twip钢表现出优异力学性能,延伸率为47.14%,抗拉强度达到927 MPa,强塑积达到43700 MPa·%。在室温下完全为奥氏体组织,在拉伸后孪晶的数量明显增加。实验样钢中既包含了TRIP效应,又包含了twip效应,并且还有马氏体效应的共同作用。

关键词： TEM twip 孪生显微组织

来源：

同方期刊数据库评论