Z.Z. Yang
,
W. Tian
,
Q.R. Ma
,
null
,
null
,
null
,
null
,
null
,
null
,
null
,
null
金属学报(英文版)
Since the development of offshore oil and gas, the increased submarine oil and gas pipelines were installed. All the early steel pipes of submarine pipeline were depended on importing because of the strict requirements of comprehensive properties such as anti-corrosion, resistance to pressure and so...
关键词:
Mechanical Properties
,
Properties
,
Offshore
,
oil
,
and
,
g
Zhi-Hong Jia
,
Hui-Lan Huang
,
Xue-Li Wang
,
Yuan Xing
,
Qing Liu
金属学报(英文版)
doi:10.1007/s40195-016-0379-0
Lots of the available literatures on hafnium in aluminum alloys are reviewed. The new binary Al-Hf phase diagram is simply assessed. Two ternary phase diagrams including Al-Hf-Zr and Al-Hf-Sc are accounted for, with emphasis on the aluminum rich part of the diagrams. The relationship between different structure Al3Hf and several different formation mechanisms including the probable phase transformation mechanisms is described. The continuous Al3Hf phase particles can serve as a grain refiner in the Al melt and a precipitate for controlling the grain structure of the alloy and a strengthening precipitate. A series of effects of Fe, Si, Zr, Sc and Li addition on the behavior of Al3Hf and Al alloys are given. Moreover, the effects of Hf on the microstructure and properties of Al alloys, such as hardness and creep, are reviewed. Finally, some views of Hf-containing Al alloys are summarized.
关键词:
Al-Hf
,
Phase
,
diagram
,
Al3Hf
,
precipitate
,
Microstructure
,
Properties
Wenhui LIU
,
Yangai LIU
,
Shoumei XIONG
,
Baicheng LIU
,
Y.Matsumoto
,
M.Murakami
材料科学技术（英文）
Casting pressure conditions have great influences on the casting defects, such as gas porosity, shrinkage porosity and gas holes. A Mg cylinder head cover die casting was used to experimentally study the influences of casting pressure, the loading time and the piston position of pressure intensifica...
关键词:
Magnesium alloy
,
null
,
null
,
null
,
null
Min ZHAO
材料科学技术（英文）
TiB2P/Al composite was successfully fabricated by squeeze casting technology. Its mechanical and tribological properties were evaluated. The elimination of Ti-Al intermetallic compound was confirmed by X-ray diffraction (XRD) studies. At 45% volume fraction, the bending strength at ambient temperatu...
关键词:
TiB2
,
null
,
null
,
null
Jinfeng XU
,
Qiuya ZHAI
,
Sen YUAN
材料科学技术（英文）
Energy-storage welding connection characteristics of rapidly solidified AZ91D Mg alloy ribbons with 40~70 μm thickness are investigated using a microtype energy-storage welding machine. The microstructure and performance of the connection joints are analyzed and studied. The research results indicat...
关键词:
AZ91D
,
null
,
null
,
null
,
null
Qijie ZHAI
,
Li FU
,
Huaying ZHAI
材料科学技术（英文）
Effect of Nb on microstructure and mechanical properties of chilled cast iron at room and elevated temperatures is studied in this research. The results demonstrate that the cast structure and mechanical properties of chilled cast iron at room and elevated temperatures are improved with the addition...
关键词:
Nb
,
null
,
null
,
null
Wen CHEN
,
Manzhu KE
,
Qing XU
,
Quanyao ZHU
,
Liqiang MAI
,
Li LI
材料科学技术（英文）
In this article, the vanadium pentoxide sols are synthesized by two different routes (melted and quenched in oxygen atmosphere or in air). The structure and properties of the vanadium pentoxide xerogel films are characterized by XRD, ESR, cyclic voltammograms curves and UV-visible transmittance anal...
关键词:
Preparation atmosphere
,
null
,
null
,
null
王力
,
张保红
,
林冰涛
,
唐亮亮
,
邝用庚
宇航材料工艺
对自发汗冷却材料的种类及特点进行了简介,综述了自发汗冷却材料的几种主要制备方法及其优缺点,详细阐述了自发汗冷却材料的研究现状、影响因素及其应用,并对其发展方向进行了讨论.
关键词:
自发汗冷却材料
,
工艺
,
性能
,
应用
叶宏
,
王宾
,
龙刚
,
邓代玉
表面技术
doi:10.3969/j.issn.1001-3660.2010.01.006
为提高镁合金表面的耐蚀性,采用热喷涂技术在AZ31镁合金表面制备铝涂层,并利用脉冲钨极氩弧表面熔覆的方法进行表面重熔,获得富铝的合金化层,分析了合金化层的组织结构和性能.研究结果表明:在AZ31镁合金表面的铝合金化层中存在典型的树枝晶结构,含有金属间化合物Mg_2Al_3,Mg_(17)Al_(12...
关键词:
镁合金
,
脉冲钨极氩弧
,
Al合金化
,
性能
