Chaos terrain, expressed as enigmatic blocky landscapes on Mars, has poorly understood origins. Several hypotheses have been put forward to explain chaos terrain formation, but none fully account for the morphologies observed in Galilaei crater, focus of this study. Previously inferred be a paleolake, crater hosts composed kilometer-scale, disorganized blocks around southern and southeastern ma...

In this manuscript, the effects of Mo content on microstructure and impact toughness X80 thick-walled low-temperature pipeline steel were studied. Two test steels with different (0.25% 0.40%) prepared by thermo-mechanical control process. The properties measured at −45 °C, evolution was observed via an optical microscope (OM), a scanning electron (SEM), back-scattered diffraction (EBSD), transm...

The generalized Hoek-Brown (GHB) failure criterion can estimate the rock mass parameters required for mechanics–related analyses such as numerical modeling in geomechanics. determination of GHB has been developed field mechanics. Due to wide use Mohr-Coulomb and lack an existing relationship determining its a mass, equivalent (EMC) be derived from GHB. To determine differences these two criteri...

Q&P1180 is a typical third generation of advanced high strength steel. In this paper, the microstructure evolution steel during uniaxial tension investigated comprehensively by using in situ neutron diffraction technique, electron backscatter (EBSD), scanning microscope (SEM) and elastic-visco-plastic self-consistent with phase transformation (EVPSC-PT) model. Tempered martensite (TM) determine...

The microstructure and tensile properties of die-cast Mg-1.6 wt%La-1.0 wt%Ce alloys with Gd content ranging from 0 wt% to 3.0 were investigated. major intermetallic compound formed at the grain boundaries was skeleton-like Mg12RE phase, domains {011} twins can be observed in Mg12RE. Three minor compounds addition, i.e., irregular-shaped Mg2Gd needle-like Mg3Gd phase blocky Gd-Mn phase. addition...

Regularization methods improve the stability of ill-posed inverse problems by introducing some a priori characteristics for solution such as smoothness or sharpness. In this contribution, we propose multidimensional, scale-dependent wavelet-based L1-regularization term to cure ill-posedness airborne (time-domain) electromagnetic induction problem. The regularization is flexible, it can recover ...

Abstract As demonstrated at Anak Krakatau on December 22 nd , 2018, tsunamis generated by volcanic flank collapse are incompletely understood and can be devastating. Here, we present the first high-resolution characterisation of both subaerial submarine components collapse. Combined Synthetic Aperture Radar data aerial photographs reveal an extensive failure that bounds pre-event deformation pr...

In the present paper, the Zelt algorithm has been extended for ray tracing through an anisotropic model. In anisotropic media, the direction of the propagated energy generally differs from that of the plane-wave propagation. This makes velocity values to be varied in different directions. Therefore, velocity modeling in such media is completely different from that in an isotropic media. The vel...

Terms of service of the steels with retained austenite in the microstructure, is severely depended on the stability of austenite during the course of deformation. The present work aims to evaluate the mechanical stability of austenite in nanostructured, carbide free bainitic steels during tensile testing and cold rolling process. To achieve the microstructure with retained austenite, the steel ...

The development of nano/ultrafine bainitic structure in AISI 52100 steel was the goal of this study. For this purpose,the AISI 52100 the specimens were austenitized at 1050 °C for 60 min followed by low-temperature austemperingtreatment at different temperatures and times. The austempered samples were characterized using field emissionscanning electron microscopy (FESEM), X-ra...