材料期刊网，材料期刊，材料类期刊，材料期刊投稿

PHSICAL MODELLING AND PROCESSING OF Ti-6Al-4V ELI

C.P. Chou , S.C. Wang , C.C. Chang and W.R. Wang 1) Department of Mechanical Engineering , National Chiao Tung University Hsinchu , Taiwan 300 , China 2) Materials Research Laboratories , Industrial Technology Research Institute Chutung , Taiwan 310 , China

金属学报(英文版)

Titanium has been widely used as the implant materials of joint prostheses. This paper simulates the microstructures of the hot forged titanium knee joint component by physical modeling. Ti-6Al-4V ELI were deformed by GLEEBLE 2000 hot deforma- tion simulator in compression mode to determine the hot workability, in the range of 900 to 1100℃, with the strain rates between 0.05 to 5 s~(-1). Test results derived from specimens processed by on-cooling test and on-heating test were compared, thereby estimating the effect due to thermal history. The forging process of Ti-6Al-4V ELI tibial base plate of knee joint prostheses was design based on the workability data obtained.

关键词: physical modeling , null , null , null , null

Shape-Memory Intermetallics Development in Taiwan

S.K.Wu(Institute of Materials Science and Engineering , National Taiwan University Taipei , Taiwan 106 , China) H.C. Lin(Department of Materials Science , Feng-Chia University. Taichung. Taiwan 407. China)

金属学报(英文版)

In Taiwan, many groups engage in the development of TiNi SMAs. The two-stage martensitic transformations of and have been clarified for both TiNi binary and ternary alloys. The deformation behaviors have been investigated by cold-rolling, hot-rolling and wire drawing. Both shape memory effect and pseudoelasticity can be improved by some thermal-mechanical treatments. The damping characteristics of TiNi and TiNiX SMAs have also been systematically studied. Both B19'/B19 martensite (M)and R-phase(R) have high daming capacities due to the stress-induced movement of twin boundaries. Meanwhile, the addition of third elements-Fe and Cu-can largely increase the damping capacity.Recently, some high temperature shape memory alloys-TiHiPd and TiNi-.Au alloys-have also been intensively studied in Taiwan. All these potential investigations on the TiNi SMAs in Taiwan have attracted much attention and their important characteristics will be applied widely in the near future.

关键词: : TiNi shape memory alloys. research and development in Taiwan

310乙字钢开裂原因分析

刘莉

物理测试

本文就310乙字钢腿部开裂进行了系统检测分析，开裂原因为该批310乙字钢在炉内局部加热温度过高，长时间保温奥氏体晶粒粗大，局部产生异常的魏氏组织，其塑性、韧性变差，导致其在后续轧制过程中开裂。

关键词:

310乙字钢开裂原因分析

刘莉 , 李智丽

物理测试

文章就310乙字钢腿部开裂进行了系统检测分析,开裂原因为该批310乙字钢在炉内局部加热温度过高,长时间保温奥氏体晶粒粗大,局部产生异常的过热组织,其塑性和韧性变差,导致其在后续轧制过程中开裂.

关键词: 310乙字钢 , 开裂 , 过热组织

氢对310不锈钢钝化膜的影响*

曾一民 , 乔利杰 , 林昌健

中国腐蚀与防护学报

采用电化学和STM方法研究了氢对310不锈钢阳极化过程、钝化膜形成过程和表面形貌特征以及膜耐点蚀性能的影响，并进行了相应的理论分析。研究表明：氢会降低不锈钢的自腐蚀电位，缩短钝化区域并使其向低电位方向偏移；降低反应电阻，增大钝化电流密度；降低膜在纳米尺度上的结晶度和耐点蚀性能。

关键词: 氢 , anodic polarization , passive film , pitting

高温时效后的310不锈钢高温硫腐蚀研究

李德俊 , 张扬伟 , 于鑫

材料保护 doi:10.3969/j.issn.1001-1560.2001.03.003

研究了310不锈钢在气氛总压为10-5 Pa，于2.3%SO2-S2-8.8%N2气氛中600 ℃下的高温硫腐蚀行为。利用金相、能谱及X射线衍射等分析手段对其腐蚀形貌、成分及结构进行了分析。结果表明：310不锈钢于700 ℃，10 000 h时效在其晶界大量析出σ相，造成晶界附近贫Cr，从而降低了晶界抗硫腐蚀性能，使高温时效处理后的310不锈钢抗硫腐蚀能力明显降低；未时效处理的310不锈钢以均匀腐蚀为主，时效处理后的则以晶界腐蚀为主，并伴随有均匀腐蚀。

关键词: 310不锈钢 , 高温时效 , 硫腐蚀

氢对310不锈钢钝化膜半导体性质的影响

曾一民 , 乔利杰 , 郭献忠 , 李金许 , 褚武扬

金属学报

采用交流阻抗和光电化学方法研究了氢对310不锈钢钝化膜半导体性质的影响.结果表明,氢对310不锈钢钝化膜的半导体类型没有影响,均是n型对未充氢的试样,随钝化电位的升高,钝化膜的施主浓度降低而平带电位则升高.氢能升高310不锈钢钝化膜的电容、施主浓度和平带电位.氢使310不锈钢钝化膜的光电流峰值升高、峰位后移,即氢降低钝化膜的光学禁带宽度,这和氢使钝化膜中Cr的化合物含量下降有关.

关键词: 钝化膜 , null , null , null

氢对310不锈钢钝化膜半导体性质的影响

曾一民 , 乔利杰 , 郭献忠 , 李金许 , 褚武扬

金属学报 doi:10.3321/j.issn:0412-1961.2001.01.014

采用交流阻抗和光电化学方法研究了氢对310不锈钢钝化膜半导体性质的影响.结果表明,氢对310不锈钢钝化膜的半导体类型没有影响,均是n型对未充氢的试样,随钝化电位的升高,钝化膜的施主浓度降低而平带电位则升高.氢能升高310不锈钢钝化膜的电容、施主浓度和平带电位.氢使310不锈钢钝化膜的光电流峰值升高、峰位后移,即氢降低钝化膜的光学禁带宽度,这和氢使钝化膜中Cr的化合物含量下降有关

关键词: 钝化膜 , 钝化电位 , 氢 , 不锈钢

Dissolution-facilitating Dislocation Emission, Motion and Initiation of SCC in 310 Stainless Steel

Yizhong HUANG , Qizhi CHEN and Wuyang CHU(Dept. of Materials Physics , University of Science & Technology Beijing , Beijing 100083 , China)

材料科学技术（英文）

Using a special constant deflection device, the in situ TEM observations of dislocation emission,motion and the initiation of nanocrack in 310 stainless steel in water were carried out. The results show that SCC in thin foil specimen of 310 stainless steel can occur in water. A nanocrack initiated in the DFZ or at the blunt crack tip in corrosion solution after dislocation emission,multiplication and motion, which were induced by the localized anodic dissolution, reached a critical condition. The nanocrack propagated by a cleavage mode because of the influence of the corrosion solution.

关键词: