Atomic simulation of fatigue crack propagation in Ni3Al

被引：17

作者：

Ma, Lei ^{[1
,2
]}

Xiao, Shifang ^{[2
]}

Deng, Huiqiu ^{[2
]}

Hu, Wangyu ^{[1
,2
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

[2] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2015年 / 118卷 / 04期

关键词：

LOW-CYCLE FATIGUE; SINGLE-CRYSTALS; THERMOMECHANICAL FATIGUE; TWIN FORMATION; NICKEL; CREEP; TIP; ORIENTATION; STRESS; GROWTH;

D O I：

10.1007/s00339-014-8895-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue crack propagation behavior of Ni3Al was studied using molecular dynamics simulation at room temperature. The simulation results showed that the deformation mechanisms and the crack propagation path were significantly influenced by the orientation of initial crack. The formation process of slip bands around the crack tip was investigated in various cracks and indicated that the slip bands were able to hinder the initiation and propagation of cracks. Besides, the crack growth rate was also calculated by the Paris equation, and the results revealed that the crack growth rate increased with the increasing stress intensity factor range.

引用

页码：1399 / 1406

页数：8

共 31 条

[1] Twin formation during creep in single crystals of nickel-based superalloys [J].

Ardakani, MG ;

McLean, M ;

Shollock, BA .

ACTA MATERIALIA, 1999, 47 (09) :2593-2602

[2] INFLUENCE OF ORIENTATION ON THE LOW-CYCLE FATIGUE OF MAR-M200 SINGLE-CRYSTALS AT 650-DEGREE-C .2. CYCLIC STRESS-STRAIN BEHAVIOR [J].

CHIERAGATTI, R ;

REMY, L .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 141 (01) :11-22

[3] Mechanism of intense shear failure in Ni3Al single crystals [J].

Dao, M ;

Kad, BK ;

Asaro, RJ .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1997, 75 (02) :443-459

[4] Atomistic mechanisms of fatigue in nanocrystalline metals [J].

Farkas, D ;

Willemann, M ;

Hyde, B .

PHYSICAL REVIEW LETTERS, 2005, 94 (16)

[5] BEHAVIOR OF NICKEL-BASE SUPERALLOY SINGLE-CRYSTALS UNDER THERMAL-MECHANICAL FATIGUE [J].

FLEURY, E ;

REMY, L .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1994, 25 (01) :99-109

[6] MOLECULAR-DYNAMICS STUDY OF MELTING AND FREEZING OF SMALL LENNARD-JONES CLUSTERS [J].

HONEYCUTT, JD ;

ANDERSEN, HC .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (19) :4950-4963

[7] A comparative study on thermomechanical and low cycle fatigue failures of a single crystal nickel-based superalloy [J].

Hong, H. U. ;

Kang, J. G. ;

Choi, B. G. ;

Kim, I. S. ;

Yoo, Y. S. ;

Jo, C. Y. .

INTERNATIONAL JOURNAL OF FATIGUE, 2011, 33 (12) :1592-1599

[8]

Hong-Xian X., 2009, CHINESE PHYS B, V18

[9] Effect of plastic anisotropy on tensile strength of single crystals of an Ni-based superalloy [J].

Kakehi, K .

SCRIPTA MATERIALIA, 1999, 42 (02) :197-202

[10] Deformation and damage mechanisms in IN792 during thermomechanical fatigue [J].

Kanesund, Jan ;

Moverare, Johan J. ;

Johansson, Sten .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (13-14) :4658-4668

← 1 2 3 4 →