Probing the chirality-dependent elastic properties and crack propagation behavior of single and bilayer stanene

2018 ◽  
Vol 20 (35) ◽  
pp. 22768-22782 ◽  
Author(s):  
Avik Mahata ◽  
Tanmoy Mukhopadhyay
Keyword(s):  
Mechanical Properties ◽  
Crack Propagation ◽  
Elastic Properties ◽  
Two Dimensional ◽  
Propagation Behavior ◽  
The Family ◽  
Crack Propagation Behavior

Mechanical properties of stanene, a promising quasi-two-dimensional honeycomb-like nanostructure of tin belonging to the family of 2D-Xenes (X = Si, Ge, Sn), have been investigated in this paper.

scholarly journals Role of LPSO Phase in Crack Propagation Behavior of an As-Cast Mg-Y-Zn Alloy Subjected to Dynamic Loadings

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 498 ◽  
Author(s):  
Xuezhi Shi ◽  
Yunqian Long ◽  
Huiqiu Zhang ◽  
Liqiao Chen ◽  
Yingtang Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crack Propagation ◽  
Crack Opening ◽  
Dynamic Crack Propagation ◽  
Dynamic Crack ◽  
Lpso Phase ◽  
Propagation Behavior ◽  
Dynamic Loadings ◽  
Crack Propagation Behavior

In this work, the role of long period stacking ordered (LPSO) phase in the crack propagation behavior of an as-cast Mg95.5Y3Zn1.5 alloy was investigated by dynamic four-point bent tests. The as-cast Mg95.5Y3Zn1.5 alloy is mainly composed of Mg matrix, 18R LPSO phase located at the grain boundaries and 14H LPSO phase located within the Mg matrix. The alloy exhibits excellent dynamic mechanical properties; the yield stress, maximum stress and strain to failure are 190.51 ± 3.52 MPa, 378.32 ± 4.26 MPa and 0.168 ± 0.006, respectively, at the strain rate of ~3000 s−1. The LPSO phase effectively hinders dynamic crack propagation in four typical ways, including crack tip blunting, crack opening inhibition, crack deflection and crack bridging, which are beneficial to the mechanical properties of the alloy under dynamic loadings.

scholarly journals Mechanical Properties Evaluation and Crack Propagation Behavior in Dissimilar Metal Welded Joints of 304 L Austenitic Stainless Steel and SA508 Low-Alloy Steel

2022 ◽  
Vol 2022 ◽  
pp. 1-13
Author(s):  
Yuman Sun ◽  
He Xue ◽  
Fuqiang Yang ◽  
Shuai Wang ◽  
Shun Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Crack Propagation ◽  
Welded Joint ◽  
Initial Crack ◽  
Boundary Line ◽  
Pressurized Water ◽  
Propagation Length ◽  
Dissimilar Metal ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

The material mechanical properties and crack propagation behavior of dissimilar metal welded joint (DMWJ) of pressurized water reactor (PWR) was investigated. In this research, the mechanical parameters of the cladding layer materials (304L-SA508) of the DMWJ in PWRs were obtained by the continuous indentation test. Simultaneously, the user-defined (USDFLD) subroutine in ABAQUS was used to establish the heterogeneous materials model of the welded joint. On this basis, the local crack propagation path of DMWJs has been discussed based on the extended finite element method (XFEM). The result indicated that the strength value at the fusion boundary line (FB line) is the largest, and the yield strength reaches 689 MPa. The yield stress values of the cladding metal (304 L) and base metal (SA508) are 371 MPa and 501 MPa, respectively. Affected by the material constraint effect of the DMWJ, the crack will propagate through the FB line when the initial crack is perpendicular to the FB line. And when the initial crack parallels the FB line, the crack will deviate from it. Meanwhile, the crack propagation length is smaller as the initial crack tip is closer to the FB line when the load condition is constant.

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