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of Materials Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran Received 31 December 2013; accepted 24 June 2014 Abstract: Zn-22Al alloy closed-cell foams were fabricated by melt... blowing agent and investigated their compressive properties. YU et al [11] introduced SiC particles into molten Zn-22Al alloy and foamed the melt using carbonate foaming agent. LIU et al [12,13......
the tribological properties. Key words: multi directional forge (MDF); Zn-22Al alloy; silicon; tribology 1 Introduction Adding appropriate amounts of Si to the Zn-Al based alloys (also known as ZA alloys... Zn-22Al alloy containing 4 wt.% and 8 wt.% Si. It has been shown that multi-pass MDF has a great capability in improving the tribological properties of Si-rich eutectoid Zn-22Al alloys which......
Microstructural Evolution of Solid-solution-treated Zn-22Al in the Semisolid StateM.A.M.Arif1,M.Z.Omar1,N.Muhamad1,J.Syarif1,P.Kapranos21. Department of Mechanical and Materials Engineering,Faculty... analyses of the formed Zn-22AI alloy were performed by differential scanning calorimetry,scanning electron microscopy and optical microscopy.The changes in the microstructures and phase transformation......
等通道转角挤压Zn-22Al合金在NaCl水溶液中的腐蚀行为曾许多,杨丽景,张阳明,宋振纶中国科学院宁波材料技术与工程研究所摘 要:研究了等通道转角挤压(ECAP)工艺处理对Zn-22Al合金耐腐蚀性能的影响,考察了显微组织演变对Zn-22Al合金在3.5%(质量分数)NaCl溶液中的失重及电化学腐蚀行为的影响.结果表明:相比铸态Zn-22Al合金,经过ECAP处理后的试样组织明显细化,晶粒尺寸均匀.晶粒细化导致晶界大量增加及应力增大,试样表面缺陷增多,富铝相被优先腐蚀后,导致被富铝相包围的富锌相脱落,腐蚀速率加快,腐蚀失重随着挤压道次的增加而增加.电化学测试结果表明,随着挤压道次的增加,Zn-22Al合金腐蚀电流密度逐渐增加,腐蚀电位逐渐下降,合金的耐腐蚀性能随挤压道次的增加而逐渐降低.
Zn-22Al合金在超塑温度及复合加载下屈服条件的实验研究王振范东北工学院金属压力加工教研室摘 要:通过薄壁管复合加载实验及单向拉伸卸载组合实验,证明了Zn-22Al合金在超塑温度-速度条件下遵循Mises屈服条件,且与应变速度呈(σ1-σ2)2+(σ2-σ3)2+(σ3-σ1)2=2(σ=Kεm)2的关系.给出了该合金在250℃,应变速度为3.3×10-2(sec-1)时,平面应力且0.2％应变时的屈服椭圆方程为通过单向拉伸位置预置自动卸载组合实验及数学回归分析处理,可定量地确定关系式(变形一定时,σ=Kεm),且证明K,m与变形程度或变形速度有关.通过薄壁管复合加载实验和分析,还得到薄壁筒形件吹塑时的吹塑压力-应力图和压力-应变图,可为判断和选择类似的吹塑成型力学条件提供参考.关键词:......
The Strengthening of Cu-15Ni-8Sn Alloy WANG Ming-Pu1,WANG Yan-hui1,HONG Bin1 (1.School of Material Science and Engineering, Central South University, Changsha China) 摘要:The microstructure, property and relation between them of Cu-15Ni-8Sn alloy are studied by means of TEM and the measurement of hardness. The results show that γ '' metastable phase strengthens alloy because of its ordering......
The Technological Improvements of Aluminum Alloy Coloring by Electrolysis LI Nai-jun1 (1.Teachers College, Shenyang University, Shenyang 110015, P. R. China) 摘要:The technological process of coloring golden-tawny on aluminum alloy by electrolysis was improved in this paper. The optimum composition of electrolyte was found, the conditions of deposition and anodic oxidation by electrolysis were......
Microstructure and Performances of Nanocrystalline Zinc-nickel Alloy Coatings LI Guang-yu1,NIU Li-yuan1,JIANG Zhong-hao1,LIAN Jian-she1 (1.The Key Lab of Automobile Materials, Ministry of Education, China, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China) 摘要:Nanocrystalline zinc-nickel alloy coatings were deposited from an alkaline......
Alloy 20不锈钢薄板等离子弧焊接工艺研究赵斌,王宾宾,王小华中国船舶重工集团公司第七二五研究所摘 要:对Alloy 20不锈钢薄板进行了等离子弧焊接工艺试验研究.结果表明,采用等离子弧焊接方法,ERCr Ni Mo-3焊材及合理的焊接工艺参数,等离子弧焊接工艺可用于Alloy 20不锈钢薄板的焊接,焊接接头各项性能均能满足要求.关键词:Alloy 20;不锈钢薄板;等离子弧焊接;......
)Abstract:Stainless die with micro-groove and micro-hole have been designed and manufactured, which has been used to study superplastic microforming of 2091Al-Li alloy by means of superplastic forming... micro-rib specimen, behavior of material could be understood well.Key words:superplasticity; microforming; extrusion; 2091Al-Li alloy......
