Interstitial triggered grain boundary embrittlement of Al–X (X = H, N and O)

A brief review of data-driven ICME for intelligently discovering advanced structural metal materials: Insight into atomic and electronic building blocks

“…It is recommended that correlations between structural defects and local phase transformations should be considered [56,57,58,59], especially when designing novel advanced materials via the Grain-boundary Engineering or Interface Engineering approach. For instance, in the view of bonding charge density, the local phase transformation of several kinds of planar faults has been captured/reported, such as the connections between stacking faults (growth fault-I1, deformation fault-I2, and extrinsic fault-EF) and long periodic stacking ordered structures/phases (LPSOs) of Mg alloys [56], the local FCC-HCP transformation in the grain boundary of Fe and Al alloys [60,61], the local D0 23 and D0 22 phase transformations in superlattice intrinsic stacking fault (SISF), and antiphase boundaries (APBs) of superalloys [57,62]. Moreover, with the guidance of the electron redistributions in terms of bonding charge density [56,65,66,67] and electron localization functions [68,69], new insights are provided into those microstates/SROs/clusters and structural phase transformations quantitatively and qualitatively.…”

“…Moreover, with the guidance of the electron redistributions in terms of bonding charge density [56,65,66,67] and electron localization functions [68,69], new insights are provided into those microstates/SROs/clusters and structural phase transformations quantitatively and qualitatively. They are utilized to reveal the physical nature of chemical bond of pure metals (Al [61,70], Ag [71], Fe [60,72], Mg, Ti [73,74]), alloys (Co-based [57,62] and Ni-based [75]alloys), Fe-X alloys [60,72], Mg-RE-TM alloys [67,76], RHEAs [49,51], Ti-X alloys [73,74] [78], and Fe 3 O), semiconductors (graphene [65], sulfur [79], sulfides [79], and SiC [80]), and structural defects (stacking faults [62,73,81], APBs [57,75], grain boundaries [61,72], and dislocations [82,83]), which also reveal the fundamental solid-solution strengthening/embrittlement mechanism [61,73] and the grain refinement mechanism [70,74].…”

“…Because of their the high strength-to-weight ratio, recyclability, and resistance to corrosion, age-hardenable Al alloys are widely utilized in the aerospace, transport, automotive, and shipbuilding industries [133]. With the quick development of the highspeed railway and the service of the China Railway High-speed (CRH) series for more than a decade, it is extremely important to manage/maintain those trains in service environmental conditions [61,133]. Accordingly, the corrosion resistance of the utilized Al alloys is recommended to be tested strictly, such as the pitting corrosion, intergranular corrosion, and stress corrosion cracking.…”

Photoresponsivity enhancement in monolayer MoS2 by rapid O2:Ar plasma treatment

“…Recently, optoelectronic devices fabricated from MoS 2 have received notable attention [3][4][5][6]. MoS 2 phototransistors are easy to fabricate, respond to a wide range of wavelengths [3,7], and exhibit fast DC photoresponses [8,9]. In addition, their photoresponsivity can be tuned by various methods, such as back-gating [10,11], encapsulation in HfO 2 [12], strain engineering [13], layer decoupling [14] and evaporation of sub-stoichiometric molybdenum oxide overlayers [15].…”

“…We obtain good linear fits of R ph as a function of power, P , across the whole gate bias range, before and after plasma treatment. The negative slope in the log-log plot indicates the saturation of trap states in the material with increasing incident optical power [3,7,44]. In Fig.…”