气候变化领域集成服务门户(CCPortal): Making ultrastrong steel tough by grain-boundary delamination

CCPortal

DOI	10.1126/science.aba9413
	Making ultrastrong steel tough by grain-boundary delamination
	Liu L.; Yu Q.; Wang Z.; Ell J.; Huang M.X.; Ritchie R.O.
发表日期	2020
ISSN	0036-8075
起始页码	1347
结束页码	1352
卷号	368 期号:6497
英文摘要	Developing ultrahigh-strength steels that are ductile, fracture resistant, and cost effective would be attractive for a variety of structural applications. We show that improved fracture resistance in a steel with an ultrahigh yield strength of nearly 2 gigapascals can be achieved by activating delamination toughening coupled with transformation-induced plasticity. Delamination toughening associated with intensive but controlled cracking at manganese-enriched prior-austenite grain boundaries normal to the primary fracture surface dramatically improves the overall fracture resistance. As a result, fracture under plane-strain conditions is automatically transformed into a series of fracture processes in “parallel” plane-stress conditions through the thickness. The present “high-strength induced multidelamination” strategy offers a different pathway to develop engineering materials with ultrahigh strength and superior toughness at economical materials cost. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词	cracking (fracture)delamination ductile deformation grain boundary plasticity steel strain transformation
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133411
推荐引用方式 GB/T 7714	Liu L.,Yu Q.,Wang Z.,et al. Making ultrastrong steel tough by grain-boundary delamination[J]. Science,2020,368(6497).
APA	Liu L.,Yu Q.,Wang Z.,Ell J.,Huang M.X.,&Ritchie R.O..(2020).Making ultrastrong steel tough by grain-boundary delamination.,368(6497).
MLA	Liu L.,et al."Making ultrastrong steel tough by grain-boundary delamination".368.6497(2020).