大变形轧制制备超细晶镍基合金的显微组织与拉伸性能
Microstructure and Tensile Properties of Ultrafine-Grained Ni-Based Alloy Prepared by Severe Deformation Rolling
摘 要
通过98%大变形异步-同步混合轧制的方法，制备了超细晶镍基合金，并对退火后该合金的显微组织与拉伸性能进行了研究。结果表明：轧制后镍基合金组织得到显著细化，经700℃退火后晶粒尺寸在200 nm以内，经800℃退火后晶粒尺寸仍然在300 nm之内，超细晶镍基合金具有良好的组织稳定性；轧制后镍基合金的强度得到显著提高，经700℃和800℃退火后仍具有较高的强度，尤其经700℃退火后，其屈服强度及抗拉强度分别从轧制前的243 MPa和679 MPa提高到了1 907 MPa和1 949 MPa；强度的提高和良好的组织稳定性主要归因于超细晶镍基合金在退火过程中析出大量均匀弥散分布的纳米γ'相。
大变形轧制
显微组织
拉伸性能
ultrafine-grained Ni-based alloy
severe deformation rolling
microstructure
tensile property
Abstract
Ultrafine-grained Ni-based alloy was prepared by 98% severe deformation with combination of asymmetric-rolling and symmetric-rolling. The microstructure and tensile properties of the alloy after annealing were studied. The results show that the structure of Ni-based alloy was significantly refined after rolling and the grain size was less than 200 nm and 300 nm after annealing at 700℃ and 800℃, respectively. It was found that the ultrafine-grained Ni-based alloy had a good structure stability. The strength of Ni-based alloy was significantly improved after rolling and remained very high after annealing at 700℃ and 800℃. Especially after annealing at 700℃, the yield strength and tensile strength were increased from 243 MPa and 679 MPa to 1 907 MPa and 1 949 MPa, respectively. The strength improvement and good structure stability of ultrafine grain Ni-based alloy were mainly attributed to a large amount of uniformly dispersed nano-sized γ' phase that precipitated during annealing process.
中图分类号 TG156.24 DOI 10.11973/jxgccl201707015
所属栏目 材料性能及应用
基金项目
收稿日期 2016/11/8
修改稿日期 2017/5/26
网络出版日期
作者单位点击查看
备注赵欣(1981-),男,上海人,工程师,博士
引用该论文: ZHAO Xin,SHAN Aidang. Microstructure and Tensile Properties of Ultrafine-Grained Ni-Based Alloy Prepared by Severe Deformation Rolling[J]. Materials for mechancial engineering, 2017, 41(7): 76～79
赵欣,单爱党. 大变形轧制制备超细晶镍基合金的显微组织与拉伸性能[J]. 机械工程材料, 2017, 41(7): 76～79
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参考文献
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【3】LU L, SHEN Y, CHEN X, et al. Ultrahigh strength and high electrical conductivity in copper[J] Science, 2004, 304:422-426.
【4】MUKHTAROV S, DUDOVA N, VALITOV V. Processing and mechanical properties of bulk nanostructured nickel-based alloys[J]. Materials Science and Engineering A, 2009, 503(1/2):181-184.
【5】SWAMINATHAN S, RAVI S M, RAO B, et al. Severe plastic deformation (SPD) and nanostructured materials by machining[J]. Journal of Materials Science, 2007, 42(5):1529-1541.
【6】SHANKAR M R, RAO B C, CHANDRASEKAR S, et al. Thermally stable nanostructured materials from severe plastic deformation of precipitation-treatable Ni-based alloys[J]. Scripta Materialia, 2008, 58(8):675-678.
【7】SALDANA C, YANG P, MANN J B, et al. Micro-scale components from high-strength nanostructured alloys[J]. Materials Science and Engineering A,2009,503(1/2):172-175.
【8】DING Y, JIANG J, SHAN A. Microstructures and mechanical properties of commercial purity iron processed by asymmetric rolling[J]. Materials Science and Engineering A, 2009, 509(1/2):76-80.
【9】JI Y, PARK J. Development of severe plastic deformation by various asymmetric rolling processes[J]. Materials Science and Engineering A, 2009, 499(1/2):14-17.
【10】JIANG J, DING Y, ZUO F, et al. Mechanical properties and microstructures of ultrafine-grained pure aluminum by asymmetric rolling[J]. Scripta Materialia, 2009, 60(10):905-908.
【11】HUGHES D A, HANSEN N. Microstructure and strength of nickel at large strains[J]. Acta Materialia, 2000, 48(11):2985-3004.
【12】SONG K H, KIM H S, KIM W Y. Enhancement of grain refinement and mechanical properties of cross-roll rolled pure copper[J]. Materials Transactions,2011,52(5):1070-1073.
【13】WILDE G, DINDA G P, RÖSNER H. Synthesis of bulk nanocrystalline materials by repeated cold rolling[J]. Advanced Engineering Materials, 2010, 7(1/2):11-15.
【14】LI Z, FU L, FU B, et al. Effects of annealing on microstructure and mechanical properties of nano-grained titanium produced by combination of asymmetric and symmetric rolling[J]. Materials Science and Engineering A, 2012, 558(51):309-318.
【15】郭润江,孙衍东,单默昆,等.退火对大变形轧制镍基GH80A合金组织与性能的影响[J].材料热处理学报,2016,37(12):86-92.
【16】BHATTACHARJEE P P, RAY R K, TSUJI N. Cold rolling and recrystallization textures of a Ni-5 at.% W alloy[J]. Acta Materialia, 2009, 57(7):2166-2179.
【17】BIRKS L, FRIEDMAN H. Particle size determination from X-Ray line broadening[J]. Journal of Applied Physics, 1946, 17(8):687-692.
【18】CAI J Z, KULOVITS A, SHANKAR M R, et al. Novel microstructures from severely deformed Al-Ti alloys created by chip formation in machining[J]. Journal of Materials Science, 2008, 43(23):7474-7480.
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