共搜索到18643条信息，每页显示10条信息，共1865页。用时：0小时0分0秒250毫秒
......
镁合金靶板在球形弹丸侵彻过程中的破坏分析 纪伟1,范亚夫1 (1.中国兵器科学研究院宁波分院,山东,烟台,264003) 摘要:借助光学显微镜和扫描电镜等研究了Mg-Gd-Y系合金靶板在高速侵彻过程中的破坏形式,并对侵彻过程作了进一步的分析.结果表明,不同的侵彻阶段对应不同的破坏形式.在开坑和层裂阶段,靶板的破坏形式以微裂纹的形核与扩展为主;而在稳定塑性侵彻阶段,靶板的破坏形式则主要表现为绝热剪切带的形成与扩展.该合金在高速侵彻过程中背部自由面会发生多层层裂,各层破片的断口形貌有所不同.最外层破片由中心平坦区和边缘粗糙区组成.而内层破片则主要由平坦区组成.其中平坦区断口表现为准解理特征,而粗糙区断口则主要由细小的解理面组成并伴随有二次裂纹.通过对层裂破片和常规冲击断口的断口形貌进行对比发现,高速冲击载荷作用下镁合金表现出更大的塑性. 关键词:Mg-Gd-Y系合金; 高速侵彻; 绝......
during the laser melting deposition and the metallographic experiments. References [1] LI D Y, LIU R. The mechanism responsible for high wear resistance of pseudo-elastic TiNi alloy-A novel tribo... type of wear-resistant material: Pseudo-elastic TiNi alloy [J]. Wear, 1981, 221: 116-123. [4] SHIDA Y, SUGIMOTO Y. Water jet erosion behaviour of Ti-Ni binary alloys [J]. Wear, 1991, 146: 219-228. [5......
......
......
Properties of electrodeposited amorphous Fe-Ni-W alloy deposits HE Feng-jiao(何凤姣)1, WANG Miao(王 淼)1, LU Xin(陆 欣)2 1. College of Chemistry and Chemical Engineering, Hunan University, Changsha...-Ni-W alloy deposits was proposed. The structure and morphology of Fe-Ni-W alloy deposit were detected by XRD and SEM. The friction and wear behavior of Fe-Ni-W alloy deposit were studied and compared......
High Carbon Alloy Steels with Multiple Types of Ultra-fine Carbides and Their Characteristics QI Yu-hong1,DAI Yu-mei1,LIU Yan-xia1,ZHANG Zhan-ping1,GAO Hong-tao1,MA Yong-qing1 (1.Dalian Maritime University, Dalian, China) 摘要:Under normal forging and annealing conditions, there are different ultra fine carbides (M3C, M23C6, M7C3, M6C and MC) in high carbon alloy steels when alloy composition......
......
Cavitation and grain boundary sliding during creep of Mg-Y-Nd-Zn-Mn alloy V. JAN?K1, F. HNILICA1, P. ZUNA1, V. O?EN??EK2, I. STUL?KOV?3 1. Department of Materials Engineering, Faculty... significantly enhances precipitation response in commercial Mg-Y-Nd (WE) alloys and in Mg-Gd-Y, Mg-Gd-Nd or Mg-Zn-Y-Al alloys due to the increased precipitation of basal plates, prismatic rods/laths......
......
