刘持栋
,
成来飞
,
梅辉
,
栾新刚
,
周俊
无机材料学报
doi:10.3724/SP.J.1077.2008.00729
采用应力比为0.1, 频率为3Hz的正弦波分别在室温和1300℃水氧环境对2D C/SiC复合材料进行了拉-拉疲劳试验．结果表明, 若取循环基数为105, 室温和高温水氧环境下的疲劳极限分别为244.8MPa和93.3MPa, 高温下的水氧腐蚀是材料失效的主要原因．根据疲劳断口...
关键词:
2D C/SiC复合材料
,
fatigue
,
high temperature
,
oxidation
张红霞
,
裴飞飞
,
闫志峰
,
王凯
,
王文先
,
刘晓晴
,
吴广贺
,
李咏梅
稀有金属材料与工程
采用红外热像法测量AZ31B镁合金板材在疲劳过程中表面温度场的变化,结果表明,当疲劳载荷大于疲劳强度时,镁合金试样表面的温度变化经历5个阶段:温度上升阶段、温度下降阶段、稳定阶段、断裂前的温升阶段和断裂后温度下降阶段.通过疲劳过程中镁合金试样表面的温度变化规律,基于不同的理论提出了2种预测疲劳寿命的...
关键词:
AZ31B镁合金
,
疲劳
,
红外热像法
,
疲劳寿命预测
,
能量法
文磊
,
王亚明
,
金莹
,
孙冬柏
稀有金属材料与工程
在2024铝合金表面制备纳米化-微弧氧化复合涂层,该复合涂层由底层纳米晶层及顶层陶瓷涂层构成.采用XRD、TEM和SEM研究了复合涂层的微观组织结构,并研究了表面处理对铝合金基体疲劳寿命的影响规律.顶层陶瓷涂层厚度分别为5和10 μm的复合涂层试样的疲劳寿命分别提高了21.9％和23.2％,疲劳性能...
关键词:
铝合金
,
疲劳
,
微弧氧化
,
表面机械研磨处理
J.H.Yang1
,
2)
,
S.X.Li1)and C.X.Ma2) 1) State Key Laboratoryfor Fatigueand Fracture of Materials
,
Instituteof Metal Research
,
The Chinese Academy of Sciences
,
72 Wenhua Road
,
Shenyang 110015
,
China 2) Department of Materials Physics
,
Northeastern University
,
Shenyang 110006
,
China
金属学报(英文版)
The dislocation evolution wassimulated by using positiveand negative parallelstraightedgedislocationsrandomly distributing on the primary slip planes astheinitialconditions. Thevein and wallstructuresof dynamicequilibrium have been obtained. Abig dipolestructure wasfound inthesimulation....
关键词:
computersimulation
,
null
,
null
,
null
STOLOFF
,
N.S. and ALVEN
,
D.A.(Department of Materials Engineering Rensselaer Polytechnic Institute Troy
,
New York
,
12180-3590
,
USA)
金属学报(英文版)
This paper reviews recent research on embrittlement of iron aluminides brought about by exposure to moisture or hydrogen. The tensile and fatigue crack growth behavior of several Fe-Al alloys, ranging in aluminum content from 16 to 35a%, is described. It will be shown that tensile ductility and fati...
关键词:
: aluminides
,
null
,
null
,
null
,
null
Author J.H. Lee 1)
,
K.B. Yoon2)
,
Y.J. Kim3)and U.B. Baek4) 1) Engineering Research Department
,
Korea Institute of Nuclear Safety
,
P.O. Box 114
,
Yoosung
,
Taejon 305600
,
Korea2) Department of Mechanical Engineering
,
Chung Ang University
,
221 Huksuk
,
Dongjak
,
Seoul 156756
,
Korea3) Department of Mechanical Engineering
,
Sungkyunkwan University
,
300 Chunchun
,
Jangan
,
Suwon 440746
,
Korea4) Failure Prevention Research Center
,
Korea Research Institute of Standards and Science
,
P.O. Box 102
,
Yoosung
,
Taejon 305600
,
KoreaManuscript received 18 October 1998
金属学报(英文版)
Most of the assessment equations for Ct which is a wellknown fracture parameter characterizing high temperature crack growth rates, have limited applicability to constant load conditions after sudden loading. However, crack growth due to creep can also occur under load varying conditions when load ...
关键词:
creep
,
null
,
null
,
null
,
null
,
null
