Atomistic simulation of crack propagation in single crystal tungsten under cyclic loading

被引：16

作者：

Shu, Xin-Tong ^{[1
]}

Xiao, Shi-fang ^{[2
]}

Deng, Hui-qiu ^{[2
]}

Ma, Lei ^{[3
]}

Hu, Wangyu ^{[1
]}

机构：

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

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

[3] Hunan Univ Arts & Sci, Coll Phys & Elect Sci, Changde 415000, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2017年 / 32卷 / 08期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

WARM-ROLLED TUNGSTEN; MOLECULAR-DYNAMICS; BCC-IRON; VOID GROWTH; DEGREES-C; BEHAVIOR; ORIENTATION; HYDROGEN; METALS; COPPER;

D O I：

10.1557/jmr.2017.114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The propagation of a pre-existing center crack in single crystal tungsten under cyclic loading was examined by molecular dynamics (MD) simulations at various temperatures. The results indicated that the deformation mechanism and fracture behavior at crack tip were differences for variously oriented cracks. The [001](010) crack propagated as the form of the formation of slip, while the deformation mechanisms of [10-1](101) crack were blunting voids at 300 K. At higher temperature, many more slip systems were activated resulting in the change of mode of crack propagation. Simulated results showed that the effect of temperature on deformation mechanism and fracture behavior of [001](010) crack was more sensitive than that of [10-1](101) crack. Meanwhile, the influence of a 5 < 310 >{110} model grain boundary (GB) on crack propagation was also discussed. Detailed analysis showed that the grain boundary resisted the crack growth by changing the deformation mechanisms and the path of crack propagation at crack tip before the crack reached the grain boundary, and had an important influence on the crack growth rate.

引用

页码：1474 / 1483

页数：10

共 40 条

[1] Thermal stability of a highly-deformed warm-rolled tungsten plate in the temperature range 1100-1250 °C [J].

Alfonso, A. ;

Jensen, D. Juul ;

Luo, G. -N. ;

Pantleon, W. .

FUSION ENGINEERING AND DESIGN, 2015, 98-99 :1924-1928

[2] Recrystallization kinetics of warm-rolled tungsten in the temperature range 1150-1350 °C [J].

Alfonso, A. ;

Jensen, D. Juul ;

Luo, G. -N. ;

Pantleon, W. .

JOURNAL OF NUCLEAR MATERIALS, 2014, 455 (1-3) :591-594

[3] PSEUDOPOTENTIALS THAT WORK - FROM H TO PU [J].

BACHELET, GB ;

HAMANN, DR ;

SCHLUTER, M .

PHYSICAL REVIEW B, 1982, 26 (08) :4199-4228

[4] ELASTIC CONSTANTS OF SINGLE-CRYSTAL MO AND W BETWEEN 77 DEGREES AND 500 DEGREES K [J].

BOLEF, DI ;

DEKLERK, J .

JOURNAL OF APPLIED PHYSICS, 1962, 33 (07) :2311-&

[5] Many-body central force potentials for tungsten [J].

Bonny, G. ;

Terentyev, D. ;

Bakaev, A. ;

Grigorev, P. ;

Van Neck, D. .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2014, 22 (05)

[6] Atomistic simulations of the effect of embedded hydrogen and helium on the tensile properties of monocrystalline and nanocrystalline tungsten [J].

Chen, Zhe ;

Kecskes, Laszlo J. ;

Zhu, Kaigui ;

Wei, Qiuming .

JOURNAL OF NUCLEAR MATERIALS, 2016, 481 :190-200

[7] Crack nucleation at the Σ9(2(2)over-bar1) symmetrical tilt grain boundary in tungsten [J].

Cheng, Y. ;

Mrovec, M. ;

Gumbsch, P. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 483-84 :329-332

[8] Fracture behaviour of polycrystalline tungsten [J].

Gaganidze, Ermile ;

Rupp, Daniel ;

Aktaa, Jarir .

JOURNAL OF NUCLEAR MATERIALS, 2014, 446 (1-3) :240-245

[9] The ideal tensile strength of tungsten and tungsten alloys by first-principles calculations [J].

Giusepponi, Simone ;

Celino, Massimo .

JOURNAL OF NUCLEAR MATERIALS, 2013, 435 (1-3) :52-55

[10] A study into the crack propagation resistance of pure tungsten [J].

Gludovatz, B. ;

Wurster, S. ;

Hoffmann, A. ;

Pippan, R. .

ENGINEERING FRACTURE MECHANICS, 2013, 100 :76-85

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