郑成思,李龙飞,杨王玥,孙祖庆

• 1:北京科技大学新金属材料国家重点实验室
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

通过不同热处理或热机械处理工艺获得了共析钢的4种不同组织,即2种片层间距的珠光体,球化珠光体以及超细晶(α+θ)复相组织。利用室温单轴拉伸实验、SEM及TEM分析了组织状态对共析钢力学性能和塑性失稳行为的影响,结果表明:细化片层间距可以改善片层珠光体组织的协调变形能力并提高强度,均匀伸长率有所降低的同时总伸长率提高。细片层珠光体的拉伸变形失稳符合塑性失稳判据,但不同片层间距的片层珠光体拉伸断裂均属于准解理断裂。与片层珠光体组织相比,球化珠光体和超细晶(α+θ)复相组织的协调变形能力强,虽然在均匀塑性变形阶段均存在少量渗碳体粒子开裂的情况,但拉伸变形失稳均符合塑性失稳判据,拉伸断裂为韧性断裂。与片层珠光体和球化珠光体相比,超细晶(α+θ)复相组织具有较好的强度-塑性配合。

关键词(KeyWords)： 共析钢;不同组织;渗碳体;失稳;均匀伸长率

Abstract:

Keywords:

基金项目(Foundation): 中央高校基础科研业务费项目(FRF-TP-12-135A);; 新金属材料国家重点实验室自主课题

作者(Author): 郑成思,李龙飞,杨王玥,孙祖庆

DOI: 10.13289/j.issn.1009-6264.2014.03.029

参考文献(References)：

• [1]Hazra S S,Pereloma E V,Gazder A A.Microstructure and mechanical properties after annealing of equal-channel angular pressed interstitial-free steel[J].Acta Materialia,2011,59(10):4015-4029.
• [2]Gazder A A,Hazra S S,Pereloma E V.Annealing behavior and mechanical properties of severely deformed interstitial free steel[J].Materials Science and Engineering A,2011,530(15):492-503.
• [3]Yoda R,Shibata K,Morimitsu T,et al.Formability of ultrafine-grained interstitial-free steel fabricated by accumulative roll-bonding and subsequent annealing[J].Scripta Materialia,2011,65(3):175-178.
• [4]Song R,Ponge D,Raabe D,et al.Overview of processing,microstructure and mechanical properties of ultrafine grained bcc steels[J].Materials Science and Engineering A,2006,441(1-2):1-17.
• [5]Park K T,Kim Y S,Lee J G,et al.Thermal stability and mechanical properties of ultrafine grained low carbon steel[J].Materials Science and Engineering A,2000,293(1-2):165-172.
• [6]Song R,Ponge D,Raabe D,et al.Microstructure and crystallographic texture of an ultrafine grained C-Mn steel and their evolution during warm deformation and annealing[J].Acta Materialia,2005,53(3):845-858.
• [7]Song R,Ponge D,Raabe R.Improvement of the work hardening rate of ultrafine grained steels through second phase particles[J].Scripta Materialia,2005,52(11):1075-1080.
• [8]Song R,Ponge D,Raabe R.Mechanical properties of an ultrafine grained C-Mn steel processed by warm deformation and annealing[J].Acta Materialia,2005,53(18):4881-4892.
• [9]Tsuzaki K,Sato E,Furimoto S,et al.Formation of an(α+θ)microduplex structure without thermomechanical processing in superplastic ultrahigh carbon steels[J].Scripta Materialia,1999,40(6):675-681.
• [10]Maki T,Furuhara T.Microstructure and mechanical property of ultrafine(α+θ)duplex structure in high carbon steel[J].Materials Science Forum,2003,426-432:19-26.
• [11]Furuhara T,Mizoguchi T,Maki T.Ultrafine(α+θ)duplex structure formed by cold rolling and annealing of pearlite[J].ISIJ International,2005,45(3):392-398.
• [12]Tsuji N,Ueji R,Minamino Y,et al.A new and simple process to obtain nano-structured bulk low-carbon steel with superior mechanical property[J].Scripta Materialia,2002,46(4):305-310.
• [13]Ueji R,Tsuji N,Minamino Y,et al.Ultragrain refinement of plain low carbon steel by cold-rolling and annealing of martensite[J].Acta Materialia,2002,50(16):4177-4189.
• [14]Ohmori A,Torizuka S,Nagai K.Strain-hardening due to dispersed cementite for low carbon ultrafine-grained steels[J].ISIJ International,2004,44(6):1063-1071.
• [15]Torizuka S,Ohmori A,Murty S V S N,et al.Effect of strain on the microstructure and mechanical properties of multi-pass warm caliber rolled low carbon steel[J].Scripta Materialia,2006,54(4):563-568.
• [16]Tsuchida N,Masuda H,Harada Y,et al.Effect of ferrite grain size on tensile deformation behavior of a ferrite-cementite low carbon steel[J].Materials Science and Engineering A,2008,488(1-2):446-452.
• [17]Torizuka S,Eijiro M,Murty S V S N,et al.Microstructure evolution and strength-reduction in area balance of ultrane-grained steels processed by warm caliber rolling[J].Scripta Materialia,2006,55(8):751-754.
• [18]Park K T,Shin D H.Microstructural interpretation of negligible strain-hardening behavior of submicrometer-grained low-carbon steel during tensile deformation[J].Metallurgical and Materials Transactions A,2002,33(3):705-707.
• [19]Syn C K,Lesuer D,Sherby O D.Influence of microstructure on tensile properties of spheroidized ultrahigh-carbon(1.8%C)steel[J].Metallurgical and Materials Transactions A,1994,25(7):1481-1493.
• [20]田景,杨王玥,孙祖庆.工艺参数对低碳钢形变强化相变的影响[J].材料热处理学报,2005,26(5):62-67.TIAN Jing,YANG Wang-yue,SUN Zu-qing.Influence of process parameters on the deformation enhanced ferrite transformation in a low carbon steel[J].Transactions of Materials and Heat Treatment,2005,26(5):62-67.
• [21]陈国安,杨王玥,郭守真,等.低碳微量铌钢形变过程中动态相变的特点[J].材料热处理学报,2006,27(6):89-94.CHEN Guo-an,YANG Wang-yue,GUO Shou-zhen,et al.Characteristics of dynamic transformation d ring deformation of undercooled austenite in Nbmicroalloyed steel[J].Transactions of Materials and Heat Treatment,2006,27(6):89-94.
• [22]陈伟,李龙飞,杨王玥,等.工艺参数对过共析钢过冷奥氏体动态转变的影响[J].材料热处理学报,2009,30(5):55-59.CHEN Wei,LI Long-fei,YANG Wang-yue,et al.Effect of processing parameters on dynamic transformation of undercooled austenite of hypereutectoid steel[J].Transactions of Materials and Heat Treatment,2009,30(5):55-59.
• [23]郑成思,李龙飞,杨王玥,等.微观组织对共析钢室温加工硬化行为的影响[J].金属学报,2013,49(3):257-264.ZHENG Cheng-si,LI Long-fei,YANG Wang-yue,et al.Influence of microstructures of eutectoid steel on room temperature work-hardening behavior[J].Acta Metallurgica Sinica,2013,49(3):257-264.
• [24]Sabirov I,Yang C,Mullins J,et al.A theoretical study of the structure-property relations in ultrafine metallic materials with fractal microstructures[J].Materials Science and Engineering A,2013,559:543-548.
• [25]Stüwe H P,Tóth L S.Plastic instability and Lüders bands in the tensile test:the role of crystal orientation[J].Materials Science and Engineering A,2003,358(1-2):17-25.
• [26]Weber L,Kouzeli M,San Marchi C,et al.Mechanisms of the aluminium-iron oxide thermite reaction[J].Scripta Materialia,1999,41(5):541-548.
• [27]Jonas J J,Holt R A,Coleman C E.Plastic stability in tension and compression[J].Acta Metallurgica,1976,24(10):911-918.
• [28]Ashby M F.The deformation of plastically non-homogeneous materials[J].Philosophical Magazine,1970,21(170):399-424.

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