Making ultrastrong steel tough by grain-boundary delamination

doi:10.1126/science.aba9413

GSTDTAP > 气候变化

DOI	10.1126/science.aba9413
	Making ultrastrong steel tough by grain-boundary delamination
	L. Liu; Qin Yu; Z. Wang; Jon Ell; M. X. Huang; Robert O. Ritchie
	2020-06-19
发表期刊	Science
出版年	2020
英文摘要	Ultrahard materials often do not have similarly impressive fracture toughness. Liu et al. discovered a processing route for medium manganese steel alloy in which ultrahigh strength accompanies high fracture toughness. The steel relies on both transformation-induced plasticity and delamination toughening to boost the fracture properties. The steel is composed of less expensive elements, making it a potentially inexpensive material attractive for structural applications. Science , this issue p. [1347][1] 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. [1]: /lookup/doi/10.1126/science.aba9413
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/276695
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	L. Liu,Qin Yu,Z. Wang,et al. Making ultrastrong steel tough by grain-boundary delamination[J]. Science,2020.
APA	L. Liu,Qin Yu,Z. Wang,Jon Ell,M. X. Huang,&Robert O. Ritchie.(2020).Making ultrastrong steel tough by grain-boundary delamination.Science.
MLA	L. Liu,et al."Making ultrastrong steel tough by grain-boundary delamination".Science (2020).