Preliminary Research on Formation Mechanisms of Edge Spalling in PBX Milling

doi:10.3969/j.issn.1000-1093.2016.05.008

Abstract

Abstract: In view of controlling and optimizing of edge quality of polymer bounded explosive (PBX), the macroscopic and microscopic characteristics as well as the formation mechanisms of edge spalling formed by milling a HMX-based PBX are studied using microscopic photography and scanning electron microscope (SEM). Research results show that the edge spalling is formed by crack expanding toward inside workpiece at a large cutting depth, while the edge integrity is better when the cutting depth is not larger than 0.1 mm. Intact particles are few in the region of edge spalling due to transcrystalline fracture and twin crystal separation of damaged explosive particles, and the micro-damages, such as crack along crystalline boundary, polymer cracking and void, are mainly due to tensile stress and shear stress when a crack expands toward free-surface.

Key words: ordnance science and technology, milling, PBX, microscopic fracture, crack

CLC Number:

TQ564.2

XIE Feng-ying, ZHANG Qiu, LIU Wei, HUANG Jiao-hu, TANG Shi-long. Preliminary Research on Formation Mechanisms of Edge Spalling in PBX Milling[J]. Acta Armamentarii, 2016, 37(5): 823-828.

References

［1］唐维, 李明, 黄交虎, 等. PBX车削表面的细观形貌与粗糙度研究[J]. 含能材料, 2009, 17(1): 60-63.
TANG Wei, LI Ming, HUANG Jiao-hu,et al. Study on turning surface micro-morphology and roughness of PBX parts [J]. Chinese Journal of Energetic Materials, 2009, 17(1): 60-63. (in Chinese)
[2］张丘, 黄交虎, 尹锐, 等. 高聚物粘结炸药切削表面的细观形貌与形成机理[J]. 兵工学报, 2010, 31(10):1337-1340.
ZHANG Qiu, HUANG Jiao-hu, YIN Rui, et al. Micro-appearance and formation mechanisms of PBX cutting surface[J]. Acta Armamentarii, 2010,31(10):1337-1340. (in Chinese)
[3］吴松, 黄交虎, 刘维, 等. 超声振动对炸药模拟材料车削表面质量的影响[J]. 含能材料, 2014, 22(1): 66-70.
WU Song, HUANG Jiao-hu, LIU Wei, et al. Effect of ultrasonic vibration on cutting surface quality of explosive stimulant [J]. Chinese Journal of Energetic Materials, 2014, 22(1):66-70. (in Chinese)
[4］唐维, 宗和厚, 魏智勇, 等. 超声振动切削对炸药模拟材料切削温度的影响[J]．含能材料, 2014, 22(1):71-74.
TANG Wei, ZONG He-hou, WEI Zhi-yong, et al. Effect of ultrasonic vibration on cutting temperature of explosive stimulant [J]. Chinese Journal of Energetic Materials, 2014, 22(1): 71-74. (in Chinese)
[5］唐维, 魏智勇, 黄交虎, 等. 高聚物粘接炸药模拟材料的超声振动切削试验研究[J]. 兵工学报, 2013,34(1):33-38.
TANG Wei, WEI Zhi-yong, HUANG Jiao-hu,et al. An experimental study on ultrasonic vibration cutting for polymer bonded explosive simulants[J]. Acta Armamentarii, 2013, 34(1):33-38. (in Chinese)
[6］ Wang C Y, Zhou L, Fu H, et al. High speed milling of graphite electrode with endmill of small diameter [J]. Chinese Journal of Mechanical Engineering, 2007, 24(4): 27-31.
[7］罗景润. PBX的损伤、断裂及本构关系研究[D]. 绵阳:中国工程物理研究院,2001.
LUO Jing-run. Study on damage, fracture and constitutive relation ofPBX [D]. Mianyang: China Academy of Engineering Physics, 2001. (in Chinese)
[8］梁增友,黄风雷,段卓平,等. PBX炸药及其模拟材料冲击损伤的试验研究[J]. 弹箭与制导学报, 2008, 28(1):131-134.
LIANG Zeng-you, HUANG Feng-lei, DUAN Zhuo-ping, et al. Experiment study on impact damage of PBX explosive and simulation material[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2008, 28(1):131-134. (in Chinese)
[9］周莉. 高性能石墨铣削加工研究[D]. 广东: 广东工业大学, 2007.
ZHOU Li. Research on high speed milling of high-performanced graphite [D]. Guangdong: Guangdong University of Technology, 2007. (in Chinese)
[10］张智海. 铣削工艺系统瞬态力学模型和非线性动力学特性的研究[D]. 北京: 清华大学, 2001.
ZHANG Zhi-hai. Research on instantaneous mechanical model and nonlinear dynamic characteristics for milling process system [D].Beijing: Tsinghua University, 2001. (in Chinese)
[11］曹阳, 聂福德, 李越生. TATB 基PBX 复合材料的微观结构分析[J]. 火炸药学报, 2004, 27(3): 58-61.
CAO Yang, NIE Fu-de, LI Yue-sheng. Analysis of microstructure of TATB based PBX [J]. Chinese Journal of Explosives & Propellants, 2004, 27(3): 58-61. (in Chinese)
[12］ Zhang W B, Dai B, Tian Y, et al. Experimental study on micron crystal defect of explosive by μVCT[J]. Chinese Journal of Energetic Materials, 2008, 16(6): 767-771.
[13］梁华琼, 雍炼, 唐常良, 等. 压制过程中PBX炸药颗粒的破碎及损伤[J]. 火炸药学报, 2010,33(1): 27-30.
LIANG Hua-qiong, YONG Lian, TANG Chang-liang,et al. Crack and damage of PBX during pressing [J]. Chinese Journal of Explosives & Propellants, 2010, 33(1): 27-30. (in Chinese)
［14］张伟斌, 李敬明, 杨雪海, 等. TATB颗粒温压成形PBX的初始细观损伤［J］. 含能材料, 2015, 23(2): 202-204.
ZHANG Wei-bin, LI Jing-ming, YANG Xue-hai, et al. Initial mesoscopic damage of TATB based PBX pressed by warm compaction［J］. Chinese Journal of Energetic Materials, 2015, 23(2): 202-204. (in Chinese)

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