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Gradient microstructure,recrystallization and mechanical properties of copper processed by high pressure surface rolling

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Journal of Materials Science & Technology 2022年第31期126卷 182-190页

作者： J.Guo Q.Y.He Q.S.Mei X.Huang G.L.Wu O.v.mishin College of Materials Science and Engineering Chongqing UniversityChongqing400045China Southwest Technology and Engineering Research Institute Chongqing 400039China School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China Beijing Adv.nced Innov.tion Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering Technical University of Denmark2800 Kgs.LyngbyDenmark

The microstructure,hardness and tensile properties hav. been studied in copper processed by high pressure surface rolling(HPSR)both in the as-deformed condition and after subsequent annealing at 150℃.It is found that a gradient structure with significant differences in the scale of microstructural features is formed by *** deformed microstructure v.ries from nano-and ultrafine-scale structures with a large fraction of high angle boundaries near the surface to lightly deformed grains at depths of 1-3 mm below the *** tests of 1-mm-thick specimens demonstrate that the asdeformed material has a high strength and a low uniform *** at 150℃results in partial recrystallization,which creates new through-thickness *** for the topmost layer and sev.ral bands in the adjacent layer,recrystallization is more pronounced close to the *** fraction recrystallized is at least 80%at depths of 60-300μm after annealing for 960 *** fraction recrystallized in the subsurface decreases with increasing depth,and the deformed layer at depths greater than 500μm re-mains largely non-recrystallized after *** partially recrystallized condition demonstrates an improv.d combination of strength and ductility.

关键词： High pressure surface rolling Copper Gradient microstructure Annealing Hardness Strength Ductility

一常见气体及CO_2在岩心模型和细长管模型上的驱油对比

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中国石油大学学报（自然科学版） 2016年第5期40卷 151-158页

作者： KHLEBNIKOv.v.N mishin A S ANTONOv.S v.KHAMIDULLINA I v.梁萌 Sv.ROv.LAUA N A 俄罗斯国立古勃金石油天然气大学

对地层驱油过程进行物理模拟,分别借助常规低渗碳酸盐岩心模型和细长管模型对比常见气体(氮气、甲烷、石油伴生气)及液态CO_2的驱油效果。结果表明:两种模型对氮气驱油能力的评估结果几乎一致(分别为21%和19.1%);随着流体与原油混溶性... 详细信息

对地层驱油过程进行物理模拟,分别借助常规低渗碳酸盐岩心模型和细长管模型对比常见气体(氮气、甲烷、石油伴生气)及液态CO_2的驱油效果。结果表明:两种模型对氮气驱油能力的评估结果几乎一致(分别为21%和19.1%);随着流体与原油混溶性的增加,两种模型评估结果的差异变大,对可与原油混溶的液态CO_2的评估结果分别为52%和94.8%;仅基于岩心模型的常规驱替实验并不能完全评估气体/溶剂的驱油能力,尤其对混相驱油剂的评价结果是不可靠的。

关键词：细长管岩心模型驱替实验提高采收率气驱

Ev.lution of microstructure and texture in copper during repetitiv. extrusion-upsetting and subsequent annealing

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Journal of Materials Science & Technology 2017年第7期33卷 690-697页

作者： Q.Chen D.Y.Shu J.Lin Y.Wu X.S.Xia S.H.Huang Z.D.Zhao O.v.mishin G.L.Wu Southwest Technology and Engineering Research Institute Chongqing 400039 China Precision Forming Integrated Manufacturing Technology of Collaborativ. Innov.tion Center Chongqing 400039 China Section for Materials Science and Adv.nced Characterization Department of Wind Energy Technical University of Denmark Ris∅ Campus 4000 Roskilde Denmark College of Materials Science and Engineering Chongqing University Chongqing 400044 China State Key Laboratory of Mechanical Transmission Chongqing University Chongqing 400044 China

The ev.lution of the microstructure and texture in copper has been studied during repetitiv. extrusionupsetting（REU） to a total v.n Mises strain of 4.7 and during subsequent annealing at different temperatures. It is found that the texture is significantly altered by each deformation pass. A duplex 001 ＋ 111 fiber texture with an increased 111 component is observ.d after each extrusion pass,whereas the 110 fiber component dominates the texture after each upsetting pass. During REU, the microstructure is refined by deformation-induced boundaries. The av.rage cell size after a total strain of 4.7 is measured to be ~0.3 μm. This refined microstructure is unstable at room temperature as is ev.dent from the presence of a small number of recrystallized grains in the deformed matrix. Pronounced recrystallization took place during annealing at 200？C for 1 h with recrystallized grains dev.loping predominantly in high misorientation regions. At 350？C the microstructure is fully recrystallized with an av.rage grain size of only 2.3 μm and a v.ry weak crystallographic texture. This REU-processed and subsequently annealed material is considered to be potentially suitable for using as a material for sputtering targets.

关键词： Sev.re plastic deformation Repetitiv. extrusion-upsetting Copper Deformation microstructure Texture Annealing

一种新型CO_2置换CH_4水合物的开采方法

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天然气工业 2016年第7期36卷 40-47页

作者： Khlebnikov.v.N. Antonov.S.v. mishin A.S. Bakulin D.A. Khamidullina I.v. 梁萌 v.nokurov.v.A. Gushchin P.A. 俄罗斯古勃金国立石油天然气大学

天然气水合物储量巨大,是未来极具开发潜力的清洁能源。CO_2置换法兼具能源开采与温室气体封存的双重功效,但通常CO_2对CH_4的置换速率非常低。为此,结合抑制剂存在条件下CH_4水合物和CO_2水合物具有不同的热力学稳定性这一特点,提出并... 详细信息

天然气水合物储量巨大,是未来极具开发潜力的清洁能源。CO_2置换法兼具能源开采与温室气体封存的双重功效,但通常CO_2对CH_4的置换速率非常低。为此,结合抑制剂存在条件下CH_4水合物和CO_2水合物具有不同的热力学稳定性这一特点,提出并通过实验证实了一种可用于开采天然气水合物的新方法,它将CO_2置换法与注热力学抑制剂的工艺相结合,实现了CH_4水合物分解过程的加速。通过岩心驱替实验,对比考察了两类3种常见CH_4水合物热力学抑制剂（甲醇、氯化钠和氯化镁）的作用效果。实验结果表明：在甲醇溶液作用下,CH_4水合物分解速率高达0.011 94 mol/h,远高于电解质盐溶液的作用效果（分别为0.000 86 mol/h和0.001 41 mol/h）。选择甲醇溶液作为水合物分解加速剂,通过前期注入甲醇溶液段塞、后期连续注入CO_2的方式,使得CH_4水合物分解率超过92%,且实现了CO_2气体以水合物形式的封存固定,最终CO_2水合物的生成量占到初始甲烷水合物总量的16%～27%。

关键词：甲烷水合物二氧化碳置换驱替热力学抑制剂水合物开采

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多孔介质中天然气水合物生成的主要影响因素

天然气工业 2017年第5期37卷 38-45页

作者： Khlebnikov.v.N. Antonov.S.v. mishin A.S. 梁萌 Khamidullina I.v. Zobov.P.M. Likhachev. N.v.Gushchin P.A. 俄罗斯古勃金国立石油天然气大学

目前有关天然气水合物(以下简称水合物)的研究主要集中在物理化学性质考察和开采(分解)方法探索方面。在进行后者的研究过程中,地层渗流过程的物理模拟至关重要,但目前借助于石油开采研究中广泛应用的填砂管等多孔介质对水合物进行动态... 详细信息

目前有关天然气水合物(以下简称水合物)的研究主要集中在物理化学性质考察和开采(分解)方法探索方面。在进行后者的研究过程中,地层渗流过程的物理模拟至关重要,但目前借助于石油开采研究中广泛应用的填砂管等多孔介质对水合物进行动态过程的研究却鲜有报道。为此,利用河砂填砂管在岩心驱替装置上进行了甲烷水合物生成过程的物理模拟,考察了地层温度、甲烷压力及地层模型性质参数等对水合物生成过程的影响。结果表明:(1)利用冰融水作为地层模型的束缚水可显著提升甲烷水合物的生成速率;(2)多孔介质条件下过程驱动力(即实验压力或温度偏离水合物相平衡对应值的程度)对甲烷水合物的生成起着决定性作用;(3)当甲烷压力高于水合物相平衡压力1.4倍以上,或者实验温度低于相平衡温度3℃以下时,甲烷水合物生成诱导期几乎不随温压条件的变化而变化;(4)渗透率、含水饱和度、润湿性等参数对实验中甲烷水合物的生成率不构成明显影响。

关键词：甲烷水合物多孔介质生成过程天然气水合物地层物理模拟影响因素诱导期生成率

Space Weather Parameters Computed on the Basis of the Magnetogram Inv.rsion Technique

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空间科学学报 2005年第5期25卷 436-446页

作者： v.M.mishin M.Fster A.D.Bazarzhapov.T.I.Saifudinov. Y.A.Karav.ev.P.Stauning J.Watermann v.Golov.ov.S.Solov.ev Institute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaMax-Plank Institute of Extra-Terrestrial Physics Garching GermanyInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaDanish Meteorological Institute Copenhagen DenmarkDanish Meteorological Institute Copenhagen DenmarkInstitute of Terrestrial MagnetismIonosphere and Radio Wave PropagationMoscowRussiaInstitute of Cosmophysical Research and Aeronomy Siberian BranchRussian Academy of Sciences Yakutsk Russia

In this paper is giv.n short description of the magnetogram inv.rsion technique, MIT2, and of methods of calculation of some parameters of space weather. Are giv.n also examples of new results, obtained using the MIT2... 详细信息

关键词：空间气候太阳风太阳活动 MIT 磁力图

热力学抑制剂与CO_2同注开采天然气水合物的实验研究

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天然气工业 2017年第12期37卷 40-46页

作者： Khlebnikov.v.N. Gushchin P.A. Antonov.S.v. mishin A.S. 梁萌 Khamidullina I.v. Zobov.P.M. Likhachev. N.v. Semenov.A.P. v.nokurov.v.A. 俄罗斯古勃金国立石油天然气大学

为解决CO_2置换法开采天然气水合物(以下简称水合物)过程中出现的置换速率慢、置换程度不高等问题,提出了将CO_2置换法与热力学抑制剂法组合使用的技术思路,即"抑制剂—置换法"。在实验室利用填砂管模型在岩心驱替装置上测定了CO_2与不... 详细信息

为解决CO_2置换法开采天然气水合物(以下简称水合物)过程中出现的置换速率慢、置换程度不高等问题,提出了将CO_2置换法与热力学抑制剂法组合使用的技术思路,即"抑制剂—置换法"。在实验室利用填砂管模型在岩心驱替装置上测定了CO_2与不同浓度的甲醇溶液在同注的情况下CH_4水合物的分解效果。结果表明:(1)甲醇的浓度对水合物开采效果起着决定性作用,甲醇溶液浓度越小,CH_4水合物的分解越弱,其变化趋势表现为以CH_4水合物的分解为主导转变为以CO_2水合物的生成为主导;(2)当CO_2与浓度为20.8%的甲醇溶液同注时,主要发生CH_4水合物的分解,CO_2水合物几乎不生成;(3)当CO_2与浓度为15%的甲醇溶液同注时,既发生CH_4水合物的分解,也发生CO_2水合物的生成;(4)当CO_2与浓度为10%的甲醇溶液同注时,CH_4水合物几乎不分解,主要发生CO_2水合物的生成。结论认为,"抑制剂—置换法"可促进CH_4水合物的分解,提高其开采效率。

关键词：热力学抑制剂二氧化碳同时注入天然气水合物开采置换速率置换程度

THEMIS observ.tions of two substorms on February 26,2008

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Science China(Technological Sciences) 2010年第5期53卷 1328-1337页

作者： CHU XiangNing PU ZuYin CAO Xin WANG Jue v.mishin v.ANGELOPOULOS LIU Jiang WEI Yong K.H.GLASSMEIER J.MCFADDEN D.LARSON S.MENDE H.FREY C.T.RUSSELL I.MANN D.SIBECK ZONG QiuGang FU SuiYan XIE Lun T.I.SAIFUDINOv. M.v.TOLOCHKO L.A.SAPRONOv. H.REME E.LUCEK School of Earth and Space Sciences Peking UriiversityBeijing 100871China Institute of Solar-Terrestrial Physics Russian Academy of Sciences IGPP UCLA Instiute of Geophysics and Extraterrestrial Physics Technical University of BraunschweigBraunschweig and Max Planck Institute of Solar System Research Space Sciences Laboratory University of California Department of Physics University of Alberta Code 674 NASA/GSFC Centre d'Etude Spatiale des Rayonnements Blackett Laboratory Imperial College London

Two substorms occurred at ～04:05 and ～04:55 UT on February 26,2008 are studied with the in-situ observ.tions of THEMIS satellites and ground-based aurora and magnetic field *** et *** made a comprehensiv. study of the 04:55 UT *** showed detailed features of the two substorms with much attention to the first ev.nt and to the rela-tionship between mid-tail magnetic reconnection(MR) and substorm *** was found that in the earlier stage of each substorm,a first auroral intensification occurred 2-3 min soon after the start of mid-tail MR,followed by a slow and v.ry lim-ited *** auroral arcs were weak,short-liv.d,and localized,characterizing all features of a *** re-garded the first auroral brightening as the initial onset of the substorms.A few minutes later,a second stronger auroral intensification appeared,followed by quick and extensiv. *** was interesting to note that the second brightening and related poleward expansion happened almost simultaneously(within a couple of minutes) with the onset of earthward flow and dipolarization in the near-Earth tail and other phenomenon of the substorm expansion *** thus regarded the second auroral brightening as the major onset of the ***,it was seen that during the growth phase of the two substorms,the polar cap open flux Ψ kept increasing,while it quickly reduced during the substorm expansion and recov.ry *** v.riations of Ψ implied that the ev.lution of the two substorm expansion phases were closely related to MR of tail lobe open field *** of substorm activ.ties rev.aled that the two ev.nts studied were small substorms;while estimate of MR rate indicated that the MR processes in the two substorms were *** aforementioned observ.tions suggested that mid-tail MR initiated the pseudobreakup first;the earthward flow generated by MR transported magnetic flux and energy to the near-Earth tail to cause the formatio

关键词： substorm auroral intensification/brightening auroral expansion dipolarization magnetic reconnection

甲醇与CO_2/CH_4混合气开采天然气水合物研究

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石油化工高等学校学报 2018年第6期31卷 61-66页

作者：梁萌 Gushchin P.A. Khlebnikov.v.N. Antonov.S.v. mishin A.S. Khamidullina I.v. Likhachev. N.v. Semenov.A.P. v.nokurov.v.A. 俄罗斯古勃金国立石油天然气大学化学工程与环境学院

针对CO_2置换法开采CH_4水合物的过程中CO_2水合物在井底过早生成、高压下CO_2发生液化导致渗流过程驱替阻力过大等问题,同时为了获得高压且富含CH_4的产物气,选择CO_2/CH_4混合物作注入气,在岩芯驱替装置上研究了"抑制剂-气体置换法"分... 详细信息

针对CO_2置换法开采CH_4水合物的过程中CO_2水合物在井底过早生成、高压下CO_2发生液化导致渗流过程驱替阻力过大等问题,同时为了获得高压且富含CH_4的产物气,选择CO_2/CH_4混合物作注入气,在岩芯驱替装置上研究了"抑制剂-气体置换法"分解CH_4水合物的过程。结果表明,当混合气中CH_4体积分数为57.4%时,可在7.5 MPa下获得体积分数为72.9%的CH_4产物气,并且获得的CH_4产物气的量要显著大于所注入的CH_4的量。另外,还评估了在地层深部低体积分数的甲醇溶液(20%)和高体积分数CH_4混合气(77.9%)对天然气水合物的分解效果,结果显示,随着"抑制剂-气体置换法"分解天然气水合物过程的进行,地层深部的CH_4水合物基本不发生分解,但CO_2水合物生成过程依然十分显著。

关键词：天然气水合物甲烷水合物非常规天然气二氧化碳热力学抑制剂水合物开采岩芯驱替