摘要
由于特殊的非晶态结构,金属玻璃表现出与传统晶体材料十分不同的变形与断裂行为.金属玻璃具有高强、脆性和宏观均匀、各向同性的特点,使其成为研究高强度材料强度理论的理想模型材料,因而关于金属玻璃的断裂行为与强度理论研究至今仍然吸引着材料、力学和物理等学科研究人员的广泛兴趣.本文基于作者十多年来关于金属玻璃断裂与强度方面的研究工作,着重阐述对韧性和脆性金属玻璃的断裂行为和强度理论方面的最新认识和研究进展,最后提出金属玻璃断裂与强度方面尚待解决的科学问题.
Owing to the unique amorphous structure, metallic glasses（MGs） exhibit quite distinctive deformation and fracture behaviors from the conventional crystalline materials. The high strength, brittleness and macroscopic homogenous and isotropic structural features make MGs ideal model materials for the investigations of the strength theory of high-strength materials. Hence the fracture behavior and strength theory of MGs have attracted very extensive interests of researchers from the fields of materials, mechanics and physics. This paper is based on the research works of the authors on the fracture and strength of MGs in the past decade, and concentrates on discussing the current knowledge and recent advances on the fracture behavior and strength theory of ductile and brittle MGs. Firstly, the fracture behaviors of ductile and brittle MGs including tension-compression strength asymmetry, fracture mechanism and ductile- to- brittle transition will be briefly elaborated. Then the strength theories of MGs will be discussed, with our emphasis on the foundation, validation, further development and application of the ellipse criterion. At last, some unsolved issues associated with the fracture and strength of MGs are proposed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第10期1171-1182,共12页
Acta Metallurgica Sinica
基金
国家自然科学基金项目51331007
51301174和51501190资助~~
关键词
金属玻璃
屈服
断裂
变形
强度理论
metallic glass
yielding
fracture
deformation
strength theory
