Microstructure and Mechanical Properties of In-situ Fabricated Laminated Ti-(TiB+TiC)/Ti Composites
摘 要
鉴于颗粒增强钛基复合材料在提高强度的同时会引起塑韧性的下降,借鉴性能优异生物材料的叠层微观结构,利用粉末冶金结合热加工工艺(热锻+退火)的方法,制备了增强体体积分数为5%~15%的原位合成层状Ti-(TiB+TiC)/Ti复合材料,并对其组织和力学性能进行了研究。结果表明:复合材料组织完全致密化,复合层中团聚的增强体被分散,纯钛层α晶粒沿锻造方向排列;复合材料的室温抗拉强度较纯钛的提高近一倍,退火后其伸长率明显提升;随增强体体积分数的增加,复合材料的强度稍有提高,但塑性下降较为明显,增强体体积分数为5%的复合材料具备优异的综合力学性能,与增强体体积分数为15%的复合材料相比,强度仅降低了4%,但伸长率却增加了3.8倍。
Abstract
The particulate reinforced titanium matrix composites can improve the strength while reduce the ductility and toughness, therefore learned from the multilayer microstructure of nature biological materials with excellent properties, the laminated structure Ti-(TiB+TiC)/Ti composites with 5%-15% volume fraction of reinforcements were prepared by powder metallurgy and hot working processes (hot forging and annealing). Microstructure and mechanical properties of Ti-(TiB+TiC)/Ti composites were also analyzed. The results show that the microstructure of composites was densification, and the agglomerated reinforcements in the composite layer were well dispersed and distributed uniformly in the titanium matrix. Meanwhile, the α grains in pure titanium layer aligned along the forging direction. The room temperature tensile strength of laminated Ti-(TiB+TiC)/Ti composites was nearly double than that of pure titanium and elongation had the significant improvement after annealing. When the volume fraction of reinforcements increased, the strength of composites improved but the ductility dereased apparently. The composites with 5% volume fraction of reinforcements performed the excellent mechanical properties, which obtained an improvement by 3.8 times in elongation with 4% reduction in strength compared with composites with 15% volume fraction of reinforcements.
中图分类号 TB333 DOI 10.11973/jxgccl201705004
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51371114,51501112);中国博士后基金资助项目(2014M550235,2015T80431);上海博士后基金资助项目(14R21410900)
收稿日期 2015/11/16
修改稿日期 2017/3/15
网络出版日期
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备注段宏强(1991-),男,安徽亳州人,硕士研究生.
引用该论文: DUAN Hongqiang,HAN Yuanfei,LÜ,Weijie,WANG Liqiang,MAO Jianwei,ZHANG Di. Microstructure and Mechanical Properties of In-situ Fabricated Laminated Ti-(TiB+TiC)/Ti Composites[J]. Materials for mechancial engineering, 2017, 41(5): 17~21
段宏强,韩远飞,吕维洁,王立强,毛建伟,张荻. 原位合成层状Ti-(TiB+TiC)/Ti复合材料的组织与力学性能[J]. 机械工程材料, 2017, 41(5): 17~21
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【2】WANG J H, GUO X L, QIN J N, et al. Microstructure and mechanical properties of investment casted titanium matrix composites with B4C additions[J]. Material Science & Engineering A, 2015, 628:366-373.
【3】ZHANG C J, KONG F T, XIAO S L,et al. Evolution of microstructure and tensile properties of in situ titanium matrix composites with volume fraction of (TiB+TiC) reinforcements[J]. Material Science & Engineering A, 2012, 548:152-160.
【4】ZHANG Z G, QIN J N, ZHANG Z W, et al. Microstructure effect on mechanical properties of in situ synthesized titanium matrix composites reinforced with TiB and La2O3[J]. Mater Letters, 2010, 64(3):361-363.
【5】KOBAYASHI M, FUNAMI K, SUZUKI S, et al. Manufacturing process and mechanical properties of fine TiB dispersed Ti-6Al-4V alloy composites obtained by reaction sintering[J]. Material Science & Engineering A, 1998, 243:279-284.
【6】FAN Z, MIODOWNIK A P. Microstructural evolution in rapidly solidified Ti-7.5Mn-0.5B alloy[J].Acta Materialia, 1996, 44(1):93-110.
【7】GODFREY T M T, WISBEY A, GOODWIN P S, et al. Microstructure and tensile properties of mechanically alloyed Ti-6A1-4V with boron additions[J]. Material Science & Engineering A, 2000, 282:240-250.
【8】LI B S, SHANG J L, GUO J J, et al. In situ observation of fracture behavior of in situ TiBw/Ti composites[J]. Material Science & Engineering A, 2004, 383:316-322.
【9】吕维洁. 原位自生钛基复合材料研究综述[J]. 中国材料进展, 2010, 29(4):41-48.
【10】YAN Z Q, CHEN F, CAI Y X,et al. Microstructure and mechanical properties of in-situ synthesized TiB whiskers reinforced titanium matrix composites by high-velocity compaction[J]. Powder Technology, 2014, 267:309-314.
【11】刘钊, 吕维洁, 卢俊强, 等. 原位合成(TiB+TiC)/Ti-8Al-1Mo-1V复合材料的显微组织和室温力学性能[J].机械工程材料, 2009, 33(5):1-4.
【12】CLEGG W J, KENDALL K, ALFORD N M, et al. A simple way to make tough ceramics[J]. Nature, 1990, 347:455-457.
【13】HAN Y F, LI J X, HUANG G F, et al. Effect of ECAP numbers on microstructure and properties of titanium matrix composite[J]. Materials & Design, 2015, 75:113-119.
【14】MEYERS M A, MISHRA A, BENSON D J. Mechanical properties of nanocrystalline materials[J]. Progress in Materials Science, 2006, 51(4):427-556.
【15】LU K. The future of metals[J]. Science, 2010, 328:319-320.
【16】PANDEY A B, MAJUMDAR B S, MIRACLE D B. Laminated particulate-reinforced aluminum composites with improved toughness[J].Acta Materialia, 2001, 49(3):405-417.
【17】LIU B X, HUANG L J, GENG L, et al. Microstructure and tensile behavior of novel laminated Ti-TiBw/Ti composites by reaction hot pressing[J]. Material Science & Engineering A, 2013, 583:182-187.
【18】ROHATGI A, HARACH D J, VECCHIO K S, et al. Resistance-curve and fracture behavior of Ti-Al3Ti metallic-intermetallic laminate (MIL) composites[J]. Acta Materialia, 2003, 51(10):2933-2957.
【19】HAN Y F, DUAN H Q, LU W J, et al. Fabrication and characterization of laminated Ti-(TiB+La2O3)/Ti composite[J]. Progress in Natural Science:Materials International, 2015, 25(5):453-459.
【20】吕维洁, 郭相龙, 王立强, 等. 原位自生非连续增强钛基复合材料的研究进展[J]. 航空材料学报, 2014, 34(4):139-146.
【21】JIA L, LI S F, IMAI H, et al. Size effect of B4C powders on metallurgical reaction and resulting tensile properties of Ti matrix composites by in-situ reaction from Ti-B4C system under a relatively low temperature[J]. Material Science & Engineering A, 2014, 614:129-135.
【22】XU C, ZHU W F. Comparison of microstructures and mechanical properties between forging and rolling processes for commercially pure titanium[J]. Transaction of Nonferrous Metals Society of China, 2012, 22(8):1939-1946.
【23】MOSKALENKO V A, SMIRNOV A R. Temperature effect on formation of reorientation bands in α-Ti[J].Material Science & Engineering A, 1998, 246:282-288.
【24】LIU B X, HUANG L J, GENG L, et al. Fabrication and superior ductility of laminated Ti-TiBw/Ti composites by diffusion welding[J]. Journal of Alloys & Compounds, 2014, 602(10):187-192.
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