EVIDENCE OF SHEAR LIGAMENT TOUGHENING IN TIAL-BASE ALLOYS

被引：28

作者：

CHAN, KS

机构：

[1] Materials Sciences and Application Division, Southwest Research Institute, San Antonio, Texas

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 06期

关键词：

D O I：

10.1007/BF02647591

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Shear ligament toughening is a process by which fracture resistance of a material is enhanced as the result of the redundant deformation and shear fracture of intact ligaments that are formed In the crack wake. A recent micromechanical model has suggested that shear ligament toughening is responsible for the resistance-curve fracture behavior observed in lamellar TiAl-base alloys. In this article, various aspects of the shear ligament-toughening mechanism are evaluated by performing critical experiments. Experimental evidence supporting the presence of shear ligament toughening in TiAl-base alloys is presented together with st quantitative comparison of the proposed model against experimental data. Both the experimental results and model calculations indicate that the resistance-curve fracture behavior in lamellar TiAl-base alloys is indeed a manifestation of shear ligament toughening.

引用

页码：1407 / 1418

页数：12

共 31 条

[11] A HIGH-TOUGHNESS GAMMA-TITANIUM ALUMINIDE [J].