W.J. Park
,
S. Ahn
,
R. Schmees
,
and Nack J. Kim(1)(Center for Advaned Aerospace Materials
,
POSTECH. Pohang 790-784
,
Korea )2)(Research Institute of industrial Science & Technology
,
Pohang 790-600
,
Korea )3)(Pratt and Whitney
,
West Palm Beach
,
FL
,
USA Manuscript received 26 August 1996)
金属学报(英文版)
The effects of additions of Ti and W on microstructure and mechanical properties of rapidly solidified Al-Fe-V-Si alloys were investigated. Alloy powders were produced by the centrifugal rotary atomization process. After atomization, powders were screened to various mesh sizes to see the effect of powder size on the mechanical properties.These Powders were consolidated into billets using conventional powder metallurgy process, and then extruded into bar form.Microstructural analysis shows that the W addition results in the heterogeneous microstructure.On the other hand, the Ti addition refines the microstructure.Alloy containing both Ti and W has the highest thermal stability of the dispersoid. These variations in the microstructure are well reflected in the mechanical properties in that the Ti containtng alloys (with or without W) have the higher strength and ductility than the W containing alloy. It also shows that the alloys made of the coarser powders have better combinations of strength and ductility than those made of the finer powders.
关键词:
:rapid solidification
,
null
,
null
D.Eylon
,
S.R.Seagle
材料科学技术（英文）
The state of Ti research, development and industry is reviewed in this article. The fifty-year anniversary of Ti technology commercialization in the USA provides an opportunity for a historical perspective. Incorporation of "information-age" tools into alloy development, processing, and production invigorates the technology. Consolidation, diversification and globalization have been transforming the Ti industry in the recent years.
关键词:
张康侯
贵金属
doi:10.3969/j.issn.1004-0676.2008.02.011
评述了1996～2007年国际上对含金三元合金系相图、相变的研究进展.1996年以来,在主要国际专业刊物上发表了30多个三元金合金系相图的部分等温截面或纵截面,采用实验方法研究相图的工作占了绝大部分.在所研究的上述三元金合金系中,Au-Sn基合金系有11个,Au-Ag基合金系有6个,Au-Cu和Au-Sb基合金系各有4个,Au-Mn和Au-Si基合金系各有2个.这些合金系目前涉及到的主要应用领域为:钎焊材料、电触头材料、电子材料、磁性材料、形状记忆合金材料、金属离子源材料和喷丝头材料等.含金三元合金系的研究反映了当前对新型金合金功能材料的需求动向, 对指导促进相关新合金材料的开发有重要意义.
关键词:
金属材料
,
金合金
,
三元合金系
,
相图
,
进展
Fuxiao CHEN
,
Juanhua SU
,
Yunlin YANG
,
Hongtao MA
材料科学技术（英文）
The superplastic flow characteristics of hot extruded MB26 Mg alloy under the conditions of tension are studied. The effects of deformation temperature and strain rate on superplasticity are analyzed. On the other hand, the superplastic extrusion of MB26 Mg alloy is also studied.
关键词:
刘宏林
,
罗志全
原子核物理评论
介绍了星际 26Al衰变所发射1 809 keV γ射线的最新空间探测结果,综述了目前关于星际26Al起源的各种天体模型的研究进展.最后,简要阐述了14N(p,γ)15O反应截面的最新测量结果及其对26Al起源研究的影响,探讨了一种星际 26Al合成的可能新途径.
关键词:
星际介质
,
大质量主序星
,
新星
,
超新星
,
WR星
,
AGB星
郑欣
,
陈云贵
,
吴朝玲
,
童桂蓉
,
周晶晶
功能材料
淬火工艺被广泛应用于钒基固溶体贮氢合金的热处理过程中,并被认为能够有效改善合金成份均匀性,提高合金的有效放氢量.考察了淬火对V40Ti26Cr26Fe8贮氢合金放氢PCT性能的影响.合金微观结构变化的分析表明,合金在退火态时存在C14 Laves相,淬火后Laves相固溶于BCC主相中,含量下降.成分分析表明,合金BCC主相淬火后Ti含量上升.与退火处理相比,合金放氢量和平台压在淬火后均出现下降.而合金在淬火过程中产生的缺陷及应力,导致了放氢平台倾斜,滞后增大且放氢量下降.
关键词:
贮氢材料
,
淬火
,
微观结构
郝庆乐
,
韩静涛
钢铁研究学报
doi:10.13228/j.boyuan.issn1001-0963.20150166
利用Gleeble-1500热模拟压缩试验获得了26MnB5钢在880～1000℃、0.01～10s-1、最大变形55％条件下的真应力-真应变曲线,研究了26MnB5钢在试验条件下的动态再结晶行为.结果表明:26MnB5的真应力-真应变曲线在高温、低应变速率条件下出现明显峰值点特征,意味着样品发生了动态再结晶;26MnB5再结晶程度和奥氏体晶粒均匀度随温度的增加或应变速率的降低而提高,而晶粒平均尺寸则表现出先减小后增大的趋势;利用Johnson-Mehl-Avrami(JMA)方程可以建立26MnB5钢动态再结晶动力学模型,模型预测值与实测值基本吻合.
关键词:
26MnB5
,
动态再结晶
,
晶粒尺寸
,
软化分数
