Tensile properties and microstructure evolution of compacted graphite iron at elevated temperatures

doi:10.1142/S0217979219400071

CORC > 兰州理工大学 > 兰州理工大学 > 机电工程学院

	Tensile properties and microstructure evolution of compacted graphite iron at elevated temperatures
	Duan, Hongyan; Wang, Zhiming; Song, Ming
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS B
	2019-01-30
卷号	33 期号:1-3
关键词	Elevated temperature compacted graphite iron tensile strength microstructure evolution fracture design
ISSN号	0217-9792
DOI	10.1142/S0217979219400071
英文摘要	Attention has been focused on the fatigue problem for compacted graphite iron, when detonation pressure and temperature becomes higher and higher in combustion chamber for a long time. The compacted graphite iron plays an important role in the cylinder head of diesel industry for its good combination of thermal and mechanical properties. The damage mechanisms of compacted graphite iron under fatigue loading are observed in this study by scanning electron microscope (SEM) and in situ technique at elevated temperatures. The results show that tensile strength of compacted graphite iron decreases slightly at first, then decreases dramatically with the increasing temperature, which is a common phenomenon, even of various metallic materials. For the compacted graphite iron, these two stages are mainly controlled by different transformation mechanisms: the former mechanism, slip band stage, is affected by the inhibition of dislocation movement including strain strengthening, dynamic strain aging and precipitation hardening; and the latter, boundary sliding stage, is controlled by the vacancy diffusion. The newly proposed mechanisms can provide a new clue for the optimization of cast iron design. These damage mechanisms lay the foundation for the application of the crack technology.
资助项目	Natural Science Foundation of China (NSFC)[51665028]
WOS研究方向	Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000458646100009
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32155]
专题	机电工程学院
通讯作者	Duan, Hongyan
作者单位	Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Duan, Hongyan,Wang, Zhiming,Song, Ming. Tensile properties and microstructure evolution of compacted graphite iron at elevated temperatures[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2019,33(1-3).
APA	Duan, Hongyan,Wang, Zhiming,&Song, Ming.(2019).Tensile properties and microstructure evolution of compacted graphite iron at elevated temperatures.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,33(1-3).
MLA	Duan, Hongyan,et al."Tensile properties and microstructure evolution of compacted graphite iron at elevated temperatures".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 33.1-3(2019).