刘剑虹
,
何世禹
,
姚枚
金属学报
在TS-2型台式扫描电子显微镜中,装入自制的微型热疲劳试验装置,观察了3Cr2W8V钢热疲劳裂纹长大过程,结果表明:热疲劳裂纹长大前,主裂纹尖端首先钝化,在其前方出现孔洞或不连续微裂纹,热疲劳裂纹的长大通过主裂纹与孔洞及微裂之间的桥接方式进行。
关键词:
3Cr2W8V钢
,
thermal fatigue
,
crack growth
,
in situ observation
刘衍朋
,
翁更生
,
姚鸿
,
常爱军
,
付坤
,
陈忠仁
,
刘欣
,
张慧慧
高分子材料科学与工程
研究了不同共混比例的顺丁橡胶(BR)与天然橡胶(NR)组成的共混胶的裂纹尖端生长行为.采用裂纹扩展在线研究平台(DMA-Crack Growth)、超高速摄像仪、扫描电子显微镜和扫描探针显微镜对裂纹尖端进行实时追踪观测,拍摄不同共混比例的橡胶裂纹尖端的裂纹扩展动态图像.结果表明,共混比例达到m(BR...
关键词:
橡胶
,
共混
,
裂纹扩展
,
演变机理
Author M.F. Geng1)
,
T. Wang1) and X.A. Zhang2) 1) Department of Special Metal Materials and Products
,
Luoyang Ship Material Research Institute
,
Luoyang 471039
,
China2) Mechanical Properties Laboratory
,
Beijing Institute of Aeronautical Materials
,
Beijing 100095
,
China Manuscript received18 October 1998
金属学报(英文版)
The effects of cyclic loading on crack growth, fracture feature and rupture life of superalloy GH2132 have been studied in the present paper. The crack growth tests were carried out at 550 on compact tension specimens under a wide range of load levels and various periods of hold time, and the fractu...
关键词:
cyclic creep
,
null
,
null
,
null
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null
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