FRACTURE TOUGHNESS CRITERIA OF SMALL-SIZE SPECIMENS WITH ULTRAFINE-GRAINED STRUCTURE

摘要：

　　A new method for determining crack toughness of materials is described based on test data of small-size chevron-notched specimens in terms of commercial titanium VT1-0 and titanium alloy VT6 with ultrafine-grained (UFG) structure,obtained by methods of severe plastic deformation (SPD).A problem of separating a part,connected with variations in specimen ductility under crack propagation,of the total displacement of load application point,is solved.Equations to calculate specific fracture energy are obtained.The calculated values of stress intensity factor KIc are in good agreement with known test data of standard specimens.

关键词： ultrafine-grained (UFG) structure strain localization fracture specific fracture energy

作者: Yevgeny Deryugin

作者单位: Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences Russia,634021,Tomsk,2/4,Academichesky prospect

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-8

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）