Effects of spherical quasi-crystal on microstructure and mechanical properties of ZA155 high zinc ma

来源 :中国铸造 | 被引量 : 0次 | 上传用户:GXDZL126
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Effects of spherical quasi-crystal contained in Mg-Zn-Y-Mn master alloy on the microstructure and as-cast mechanical properties of ZA155 high zinc magnesium alloy have been investigated by means of optical microscopy, XRD, SEM, EDS, tensile test, impact test and hardness test. Experimental results show that the addition of spherical quasi-crystal contained in the Mg-Zn-Y-Mn master alloy into the ZA155 high zinc magnesium alloy resulted in grain refinement of the matrix, changing the morphologies of φ-Al2Mg5Zn2 phase and τ-Mg32(Al,Zn)49 phase from continuous net-like structures to discontinuous strip-like structure and blocky one, respectively.In the present research, the best comprehensive mechanical properties of reinforced ZA155 high zinc magnesium alloy has been obtained when 5.0wt% spherical quasi-crystal was introduced from the Mg-Zn-Y-Mn master alloy into the target alloy system. In such case, the room-temperature tensile strength reached 207 MPa, about 23% higher than that of the base alloy; the impact toughness peaked at 5.5 J/cm2, about 40% higher than that of the base alloy; and the elevated-temperature tensile strength reached 203 MPa, indicating improved heat resistance.
其他文献
用淋巴因子激活杀伤(LAK)细胞和重组白细胞间素-2(rIL-2)治疗恶性肿瘤引起人们很多注意。主要的局限性在于大剂量注射rIL-2的严重全身性毒性,包括心律失常和心肌梗塞。目前
心房颤动有阵发型和持久型2种,后者通常持续不消失,有“永恒性心律失常”(pul-sus irregularis perpetaus——Rothber-ger,1909)之称;药物或电击常不易使之转复。我们最近见
硝苯啶治疗高血压病早在1972年国外即有报道,国内则于近几年方应用于临床。实验证明它是目前所用钙通道阻滞剂中扩张小动脉作用最强的药物。本文报导我院自1984年以来应用该
随着人类工程活动不断增多,人们对与自然环境的破坏,也是日益增加,造成地球上地质灾害的不断产生,给人类的生命财产和安全,带来严重的后果,还阻碍着我国经济建设的可持续发展
The Foreign Investors Commission of Kazakhstan has recently selected Northwest Pipeline Company, a Chinese-Kazak joint venture, as the country’s best foreign
期刊
林豆豆,本名林立衡,生于1944年,是林彪和叶群夫妇唯一的女儿.在“文革”特殊的年代,她曾担任过《空军报》的副总编,显赫一时,备受世人关注.2002年5月18日,一家名为“黄鹤大酒
An investigation was made on the evolution of microstructures of hypoeutectic white cast iron slurry containing 2.5wt.%C and 1.8wt.%Si produced by rheocasting i
初中英语是一门十分重要的学科,有效的课堂导入是英语课堂教学成功的关键.多角度的课堂导入能够激发学生的学习兴趣,提高学习主动性和思考问题的积极性.课堂导入是教学的重要
对轻质油储罐运行系统内固有的或潜在的各种安全风险分析,并提出安全控制对策,以减少事故隐患,最大限度避免事故发生,减少人员伤亡、财产的损失、环境污染;为安全设计、施工
恩施职业技术学院地处武陵民族地区,在办学中应适应民族区域经济发展的要求,搞好高职教育的科学定位,构建多元化的办学格局,突出办学特色,从而推进民族地区高职教育的快速发