材料期刊网

FRACTAL ANALYSIS OF IMPACT FRACTURE IN STEEL

SU Hui ZHANG Yugui YAN Zhenqi Northeast University of Technology , Shenyang , China YAN Zhenqi Professor Dept.of Materials Science and Engineering , Northeast University of Technology , Shenyang 110006 , China

金属学报(英文版)

By means of fractal analysis,the fractal dimension with relation to the impact toughness,im- pact fracture characteristics and mierostructures of steel under low temperature impact have been investigated.Experimental results show that the logarithms of impact toughness in- creases monotonically with the increase of fractal dimension.The microstruetures have a great influence on fraetal dimension.There is an appropriate correlation between fraetal dimension and fracture mechanism.

关键词: fractal dimension , null , null , null

University of Science and Technology Beijing

JIA Shizhen University of Science and Technology Beijing , China.

材料科学技术（英文）

关键词:

Abstracts of papers from Journal of University of Science and Technology Beijing

稀有金属（英文版）

关键词:

Huazhong University of Science and Technology(H.U.S.T)

材料科学技术（英文）

关键词:

欢迎投稿、订阅《Journal of Wuhan University of Technology-Materials Science Edition》

武汉理工大学学报-材料科学版(英文版)

关键词:

Titanium technology in the USA - an overview

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:

改性SU8光刻胶的光学特性及其工艺

朱军 , 蒋宏民 , 陈翔 , 陈迪 , 刘景全

功能材料与器件学报 doi:10.3969/j.issn.1007-4252.2009.03.009

通过改变SU-8光刻胶中PAG浓度获得含不同PAG浓度的各种改性SU-8光刻胶,在对其光学性能以及最小曝光剂量的测定基础上研究改性SU-8光刻胶的光刻工艺,借助于改性SU-8光刻胶的合理设计以及背面曝光和正面曝光的结合应用提高多元材料复杂结构的集成制造能力.

关键词: 最小曝光剂量 , PAG , 集成制造

Jian ZHANG/Langhong Lou

材料科学技术（英文）

关键词:

CORRELATION BETWEEN STRESS COMPONENTS AND STRESS CORROSION CRACKS IN BRASS Lecturer,Department of Materials Physics,University of Science and Technology Beijing,Beijing 100083,China

QIAO Lijie LIU Rui XIAO Jimei University of Science and Technology Beijing , Beijing , China

金属学报(英文版)

The effects of stress components on nucleation sites and propagation directions of stress cor- rosion cracks in brass were investigated with specimens under mode Ⅱ and mode Ⅲ loadings. The results indicated that under mode Ⅱ loading,stress corrosion cracks nucleated on the site with maximum normal stress component and propagated along the plane perpendieular to the maximum normal stress,under mode Ⅲ loading,the stress corrosion crack was not evident on the 45°plane due to the general corrosion in aqueous solution with high NH_4OH concentra- tion,while stress corroded in aqueous solution with low NH_4OH concentration, numerous cracks with spacings of 10—150μm were found on the 45°plane with maximum normal stress and no stress corrosion cracks was observed on the plane with maximum shear stress.

关键词: stress corrosion cracking , null , null , null

用于PDMS微芯片塑性成型的SU-8模具制作工艺的优化

陆振华 , 许宝建 , 金庆辉 , 赵建龙

功能材料与器件学报 doi:10.3969/j.issn.1007-4252.2008.03.015

PDMS是制作微流控芯片的主要材料.PDMS芯片制作的主要方法是模塑法,模塑法要求有良好的塑性成型模具.SU-8以其良好的微加工特性,目前已广泛应用于微机械结构的制作,也用于PDMS塑性成型的模具.本文根据模具的特殊性,如平整、无裂纹、可多次使用等要求,研究了影响SU-8模具结构与基底材料硅片的黏附性和形成裂纹的因素,优化了SU-8微模具加工工艺,在以0.5℃/min进行升降温、210 mJ/cm2的曝光剂量、200℃条件下硬烘30min条件下得到较好的SU-8模具,提供了一种快速、复用性高、低成本的PDMS微芯片塑性成型的SU-8模具的制作方法.

关键词: PDMS , 塑性成型 , SU-8模具 , 黏附性