单晶gamma-TiAl合金微裂纹扩展行为的分子动力学模拟
付蓉; 芮执元; 剡昌锋; 罗德春; 冯瑞成
2015
Source Publication功能材料
ISSN1001-9731
Volume46Issue:13Pages:13101-13105
Abstract为了从微观原子结构探索gamma-TiAl合金裂纹扩展的机理,研究了恒定加载速度下温度对gamma-TiAl合金中裂纹扩展的影响。采用分子动力学方法对单晶gamma-TiAl合金中预置微裂纹的扩展过程进行模拟,研究表明,室温下裂纹呈脆性解理扩展,中、高温时,裂纹在扩展过程中发射位错,裂尖钝化并伴有偏转;随温度的升高,微裂纹由脆性解理扩展向韧性扩展转化,裂纹扩展速率减慢,材料塑性增加;裂尖发射的位错堆积在边界附近,使得位错堆积处萌生空洞缺陷,随着加载的继续,空洞最终长大形成微裂纹,出现边界开裂的现象。
Keywordgamma-TiAl合金 分子动力学 空洞 裂纹扩展
Indexed ByCSCD
Language中文
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMETALLURGY METALLURGICAL ENGINEERING
CSCD IDCSCD:5478932
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/70864
Collection机电工程学院
Affiliation兰州理工大学机电工程学院, 数字制造技术与应用甘肃省省部共建教育部重点实验室, 兰州, 甘肃 730050, 中国
First Author AffilicationColl Mechanoelect Engn
First Signature AffilicationColl Mechanoelect Engn
Recommended Citation
GB/T 7714
付蓉,芮执元,剡昌锋,等. 单晶gamma-TiAl合金微裂纹扩展行为的分子动力学模拟[J]. 功能材料,2015,46(13):13101-13105.
APA 付蓉,芮执元,剡昌锋,罗德春,&冯瑞成.(2015).单晶gamma-TiAl合金微裂纹扩展行为的分子动力学模拟.功能材料,46(13),13101-13105.
MLA 付蓉,et al."单晶gamma-TiAl合金微裂纹扩展行为的分子动力学模拟".功能材料 46.13(2015):13101-13105.
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