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Mechanical, electrical, and thermal properties of the directionally solidified Bi–Zn–Al ternary eutectic alloyM.Sahin1,E.adrli21. Department of Electronics and Automation, Technical Vocational School of Sciences, Nigde University2. Department of Physics, Faculty of Arts and Sciences, Nigde University摘 要:A Bi–2.0Zn–0.2Al(wt%) ternary eutectic alloy......
be observed within the eutectic region of untreated alloy in Fig. 3(a). The microstructure of treated alloy with 0.1% Bi (Fig. 3(b)) is similar to that of the untreated alloy, showing that the structure... 0.45 is required to attain full modification of the eutectic silicon. Key words: Al-Si alloy; bismuth; strontium; modification; eutectic solidification 1 Introduction Melt modification treatment in Al......
" name="ChDivSummary">Al-Si eutectic growth mechanism was investigated in a directionally-solidified Al-13 wt%Si alloy with different strontium(Sr) and magnesium(Mg) additions,growth velocities...Effects of Strontium,Magnesium Addition,Temperature Gradient,and Growth Velocity on Al-Si Eutectic Growth in a Unidirectionally-solidified Al-13 wt%,Si AlloyHengcheng Liao1,Wanru Huang1,Fang Jia31......
, the main failure modes of alloy 2 is the cracking caused by eutectic melting. The dynamic recrystallization takes place easier in alloy 1 and thus makes a smaller grain size. The dispersively distributed T-phase particles promote the homogeneous deformation of alloy and also refine grain size. Key words: 2E12 aluminum alloy; hot deformation; eutectic 出于经济性和安全性的考虑,大型飞机必须采用大尺寸结构件进行组装以减少铆接带来的增重和焊接所造成的......
;正>In the present work,the dispersion casting of Y2O3 particles in aluminum-copper alloy was investigated in terms of microstructural changes with respect to Cu contents of 20 (hypo),33 (eutectic... was employed.In case of Al-20 wt pct Cu alloy (hypoeutectic),SEM images revealed that primary Al was grown up in the beginning.After that,eutectic phase with well dispersed ceramic particles was formed.In case......
eutectic alloy; coating; magnesium; hardness; wear resistance; rapid solidification... University of Science and Technology,Qingdao 266590, China)Abstract:In order to improve the surface hardness and wear resistance of magnesium, Al-13%Si (mass fraction) alloy coating was deposited......
Microstructures of as-cast alloy: (a) Low magnitude; (b) High magnitude 图2所示为合金典型的扫描电镜相片,表2所列为图2中各箭头所指相的能谱分析结果.由图2可见,合金铸态组织较为复杂,组织中存在大量不同类型粗大第二相.铸态合金中共晶相呈蜂窝状,伴生大量条状富Cu,Ni相,块状,条状富Fe,Ni相,各种第二相相互重叠... a little below 530 ℃. The reasonable homogenization treatment process of the alloy is (490 ℃, 16 h) +(520 ℃, 16 h). Key words: heat-resistance aluminum alloy; homogenization treatment; eutectic 2D70铝合金为高纯......
Bi对AZ80镁合金凝固行为及显微组织的影响王亚霄1,付俊伟1,王晶2,罗天骄1,董旭光2,杨院生2(1.辽宁省沈阳市科学院金属研究所2.东北大学 冶金与材料学院,沈阳110006)摘 要:采用加热-激冷方法和OM,SEM,XRD,DSC等分析手段,研究了AZ80-Bi镁合金的凝固行为,分析了合金的凝固组织特征及其演变过程,阐明了合金的凝固序列.AZ80-2%Bi(质量分数)合金的铸态显微组织由α-Mg,β-Mg17Al12和Mg3Bi2相组成,其中Mg3Bi2相以片状和颗粒状两种形态存在.将2%Bi加入AZ8......
was an effective modifying agent for the eutectic Si of ADC12 alloy,when 1.0 wt.%- 1.5 wt.% Sm was added to the alloy,the coarse acicular eutectic Si was modified into fine particle or short rod...Modification of eutectic silicon and β-Al5FeSi phases in as-cast ADC12 alloys by using samarium addition饶远生1,闫洪1,胡志1,21. Institute of Advanced Forming,Nanchang University2. Jiangxi Key Laboratory......