The thermal crack characteristics of rolled tungsten in different orientations

•The thermal cracks of tungsten in different orientation were investigated.•The rolled tungsten bulk exhibited anisotropic bending strength.•Type B sample showed higher cracking threshold than that of type A sample.•Primary cracks appeared with linear profile for type A while circular for type B.•Fo...

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Veröffentlicht in:	Journal of nuclear materials 2014-01, Vol.444 (1-3), p.428-434
Hauptverfasser:	Zhang, Xiaoxin, Yan, Qingzhi
Format:	Artikel
Sprache:	eng
Schlagworte:	Cracks Cross-disciplinary physics: materials science rheology Elongation Exact sciences and technology Fatigue cracking Fatigue, embrittlement, and fracture Fracture mechanics Grain boundaries Materials science Other heat and thermomechanical treatments Physics Thresholds Treatment of materials and its effects on microstructure and properties Tungsten Yield strength
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Zusammenfassung:	•The thermal cracks of tungsten in different orientation were investigated.•The rolled tungsten bulk exhibited anisotropic bending strength.•Type B sample showed higher cracking threshold than that of type A sample.•Primary cracks appeared with linear profile for type A while circular for type B.•For both type samples, dominant intergranular cracks were observed by EBSD. Thermal shock resistance of rolled tungsten with elongated grains aligned parallel and perpendicular to the loading direction was examined. Parallel (type A) or perpendicular (type B) grain orientations influences crack characteristics including threshold, profile, pattern and parameter. Type B samples show a cracking threshold of 0.44–0.66GW/m2, which is much higher than type A samples (
ISSN:	0022-3115 1873-4820
DOI:	10.1016/j.jnucmat.2013.10.013