Scanning tunneling microscope observation of the cleavage fracture surfaces of titanium aluminide

Zhang, Yue; Chu, W.Y.; Wang, Y. B.; Qiao, Lijie; Chen, Xiao; Wang, Z. H.; Bai, Chengyan

doi:10.1116/1.587585

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

1994

DOI: 10.1116/1.587585

|View full text |Cite

Scanning tunneling microscope observation of the cleavage fracture surfaces of titanium aluminide

Yue Zhang¹,

W.Y. Chu²,

Y. B. Wang³

et al.

Abstract: The brittle fracture surfaces of titanium aluminide were investigated by the scanning tunneling microscope in the range of nanometers. The results showed that there were some river marks and/or fan patterns, ditches, dimples, and cleavage steps on the cleavage fracture surfaces. This was similar to that observed by the scanning electron microscope. The height and width of the cleavage step and the dimple size were in nanometer or quasiatomic scale.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1996

1999

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

A non‐planar crack analysis using continuously distributed sinusoidal edge dislocations and linear elasticity

Anongba

1996

Physica Status Solidi (b)

View full text Add to dashboard Cite

Non-planar cracks; propagating along crystallographic directions in the cleavage fracture of brittle materials and fluctuating about a mean plane, are represented in a simple model by a distribution of sinusoidal edge dislocations in a linear elastic medium; the dislocations are perpendicular to the crack propagation direction. The opening mode I loading is assumed. It is shown that, at the front of the sinusoidal crack and out of the mean fracture plane, the stresses are bounded and the derivative G of the energy decrease of the system with respect to crack area is zero. Only the positions of the crack front located on the mean fracture plane are associated with a nonzero value of G always lower than the well-known crack opening force Go = K ? ( l ~ v 2 ) / E per unit edge length of the planar crack ( K I is the stress intensity factor of mode I loading and E is Young's modulus). It is concluded that the sinusoidal crack cannot start propagating from positions on the crack front that are out of the mean fracture plane; instead, crack propagation could begin very near to the intersections of the crack front with the mean fracture plane if certain assumptions about the anisotropy of the surface energy are made.Des fissures non planes, se propageant suivarit des directions cristallographiques pendant le clivage des mat6riaux fragiles et fluctuant autour d'un plan moyen, sont reprksentkes par une distribution de dislocations sinusdidales coins en milieu klastique linkaire; Ies dislocations sont perpendiculaires k la direction dc propagation de la fissure. Le mode I de fracture est considkrC. On montre que, k l'extrkmit6 de la fissure sinusoidale et hors du plan de fracture moyen, les contraintes sont bornkes et la dkrivke G de la diminution de I'Cnergie du systkme par unit6 de surface de fracture est nulle; seuls Ies points du front de fissiire, situCs sur le plan moyen de rupture, sont assoc non nulle de G toujours plus faible que la force de propagation de la fissure plane Go = Kt(1 -v 2 ) / E par unite de longueur du front de fissure (KI est le facteur d'intensitk de contrainte en mode I et E est le module de Young). I1 est conch que la fissure sinusoi'dale ne pcut commencer i se propager B partir de positions du front de fissure situkes hors du plan de fracture moyen; sa propagation peut cependant itre initike k partir des positions situkes sur le plan de fracture rnoyen si des hypothhses adkquates siir l'anisotropic de 1'Cnergie dc surface sont formulkes. ') Heisenbergstr. 1; D-70569 Stuttgart, Federal Republic of Germany. ') Present address: Dkpartement, de Physique, FAST, Universitk Nationale de C6te d'Ivoire, 22 BP 582 Abidjan, Ivory Coast,.

show abstract

A non‐planar crack analysis using continuously distributed sinusoidal edge dislocations and linear elasticity

Anongba

1996

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

Fractal structure and fractal dimension determination at nanometer scale

Zhang

Qikai

Wuyang

et al. 1999

Sci. China Ser. A-Math.

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Scanning tunneling microscope observation of the cleavage fracture surfaces of titanium aluminide

Cited by 2 publications

References 0 publications

A non‐planar crack analysis using continuously distributed sinusoidal edge dislocations and linear elasticity

A non‐planar crack analysis using continuously distributed sinusoidal edge dislocations and linear elasticity

Fractal structure and fractal dimension determination at nanometer scale

Contact Info

Product

Resources

About