Effects of heat input on particle distribution in laser welded Al/TiB2 composites
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摘要: 采用光纤激光焊接技术，研究了4 mm厚纳米级TiB2粒子增强纯铝基体复合材料板材的焊接性能。通过光学显微镜及扫描电子显微镜等方法，分析了焊后纳米级TiB2粒子在焊缝中的分布及形态。结果表明，纳米级TiB2粒子增强纯铝基复合材料具有较好的焊接性能。激光焊接后焊缝中TiB2粒子分布比母材中更加均匀，但当焊接热输入过大时(功率4.0 kW，1 m/min)，TiB2粒子有破裂现象，但粒子与基体的结合面界面仍然致密，基本不影响焊缝的性能。Abstract: The weldability of TiB2 particle reinforced aluminum matrix was researched based on fiber laser welding on 4 mm thick plate. The TiB2 particles distribution and morphology were studied separately through optical microscope and scanning electron microscope. The results showed that Al/TiB2 composite presented well weldability. The TiB2 particles in the weld seam distributed more homogeneously than that in base metal. The TiB2 particle appeared to crack when the laser heat input was up to P = 4. 0 k W and v= 1 m/min,but the interface between TiB2 and base metal was close and intact which did not affect the serving properties.
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Keywords:
- aluminum matrix /
- TiB2 particles /
- laser welding /
- morphology
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[1] 王少刚,徐九华,姜澄宇.铝基复合材料的脉冲氩弧焊研究[J]. 航空材料学报.2003,23(3):27-32. [2] Vijay S J, Murugan N. Influence of tool pin profile on the metallurgical and mechanical properties of friction stir welded Al-10wt%TiB2 metal matrix composite[J]. Materials and Design, 2010, 31(7): 3585-3589..
[3] 李敬勇, 赵勇, 陈华斌. A356Al/TiB2颗粒增强铝基复合材料的搅拌摩擦焊[J]. 材料工程.2005(1): 29-32, 36. [4] 冀国娟, 谢建刚, 薛文涛, 等. SiCp/101铝基复合材料TIG焊研究[J]. 有色金属, 2003, 55(3): 1-4. [5] Wang X H, Niu J T, Guan S K, et al. Investigation on TIG welding of SiCp-reinforced aluminum-matrix composite using mixed shielding gas and Al-Si filler[J]. Materials Science and Engineering: A, 2009, 499(1-2): 106-110.
[6] Liu L M, Zhu M L, Niu J T. Study on behavior of reinforcement in molten pool for submicron composite Al2O3p/6061Al during laser welding[J]. China Welding.2001, 10(2): 99-103.
[7] Bassani P, Capello E, Colombo D, et al. Effect of process parameters on bead properties of A359/SiC MMCs welded by laser[J]. Composites Part A: Applied Science and Manufacturing, 2007, 38 (4): 1089-1098.
[8] Cui H C, Lu F G, Tang X H, et al. Reinforcement behavior in laser welding of ZL101/TiB2p MMCs[J]. Materials Transactions, 2012, 53(9):1644-1647.
[9] Cui H C, Lu F G, Peng K, et al. Research on electron beam welding of in situ TiB2p /ZL101 composites[J]. Journal of Shanghai Jiao Tong University(Science), 2010, 15(4): 479-483.
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