Hierarchical Eutectoid Nano-lamellar Decomposition in an
· However the novel nano-lamellar eutectoid-like microstructure observed in the present case in the Al 0.3 CoFeNi HEA/CCA annealed at 600 °C is a
Get Price
Fine grained fully lamellar structure acquisition and
· Fine grained fully lamellar structure acquisition and microstructure characteristics of Ti-44Al-4Nb-4V-0.3Mo-Y alloy
Get Price
Rapid decomposition of lamellar microstructure and
· The streamlined microstructure consists of predominant elongated lamellar colonies and adjacent long β o grains as well as small γ grains. Residual lamellar structures dominate the extrusion microstructure and each lamellar structure band exhibits almost the same lamellar orientation.
Get Price
Effect of lamellar microstructure on fatigue crack
· Apart from the above-mentioned researches on single phase and two-phase HEAs only a few studies have studied the effect of lamellar microstructure on fatigue crack of alloys. Hierarchical microstructure for improved superplastic properties in aluminum alloys have been studied. To obtain the high-entropy alloy with high fatigue properties the eutectic high-entropy alloy (EHEA) has been
Get Price
Formation of Aragonite Crystals in the Crossed Lamellar
· The crossed lamellar microstructure is the most commonly formed shell structure in mollusks. Although the mechanical properties and the architecture of the crossed lamellar microstructure have been extensively studied its formation mechanisms are largely unknown. In this study we obtained information on the formation processes of the aragonite crystals in the crossed lamellar microstructure
Get Price
A Newly Generated Nearly Lamellar Microstructure in Cast
· The micrograph (Figure 3 (a)) exhibits a typical DP microstructure containing large irregular shaped lamellar colonies and some equiaxed γ grains at colony boundaries. An obvious dendritic segregation was found in the SEM-BSE micrograph (Figure 3 (b)). Lamellar structure formed at dendrite region was surrounded by some Al-rich γ grains.
Get Price
GlossaryLamellar
· Lamellar. Including Lamellar Microstructure Lamellae . If something is lamellar it is layer-like. Thus a lamellar microstructure (of a eutectic phase) consists of thin layers of differing phases. For example a lamellar eutectic microstructure could contain alternate layers of alpha and beta.
Get Price
THE ROLE OF BI-MODAL AND LAMELLAR
· The resulting microstructure had an average prior-β grain of 1 mm a colony size (parallel-oriented α-phase lamellae) of 500 µm and an average α lamellae lath width of 2 µm similar to the interlamellar spacing of the FIGURE 1. Ti-6Al-4V (a) bi-mod transformed β in the bi-modal microstructure. al and (b) lamellar microstructure. FIGURE 2.
Get Price
Hierarchical Eutectoid Nano-lamellar Decomposition in an
· However the novel nano-lamellar eutectoid-like microstructure observed in the present case in the Al 0.3 CoFeNi HEA/CCA annealed at 600 °C is a
Get Price
Static coarsening behaviour of lamellar microstructure in
Static coarsening mechanism of selective laser melted (SLMed) Ti-6Al-4V with a lamellar microstructure was established at temperatures from 700 °C to 950 °C. Microstructure evolution revealed that high heat treatment temperature facilitated martensite decomposition and promoted lamellae growth.
Get Price
Lamellar Structurean overview ScienceDirect Topics
The toughness also depends on grain size for a lamellar microstructure the toughness increases with increase in grain size up to 500 μm but it becomes independent for the coarser grains. However in a lamellar grain if spacing between lamellae is superior to 10 μm the toughness of this type of microstructure is similar to that of duplex microstructure (10 MPa · m 1 / 2 ).
Get Price
THE ROLE OF BI-MODAL AND LAMELLAR
· The resulting microstructure had an average prior-β grain of 1 mm a colony size (parallel-oriented α-phase lamellae) of 500 µm and an average α lamellae lath width of 2 µm similar to the interlamellar spacing of the FIGURE 1. Ti-6Al-4V (a) bi-mod transformed β in the bi-modal microstructure. al and (b) lamellar microstructure. FIGURE 2.
Get Price
Formation of Aragonite Crystals in the Crossed Lamellar
· The crossed lamellar microstructure is the most commonly formed shell structure in mollusks. Although the mechanical properties and the architecture of the crossed lamellar microstructure have been extensively studied its formation mechanisms are largely unknown. In this study we obtained information on the formation processes of the aragonite crystals in the crossed lamellar microstructure
Get Price
THE ROLE OF BI-MODAL AND LAMELLAR
· The resulting microstructure had an average prior-β grain of 1 mm a colony size (parallel-oriented α-phase lamellae) of 500 µm and an average α lamellae lath width of 2 µm similar to the interlamellar spacing of the FIGURE 1. Ti-6Al-4V (a) bi-mod transformed β in the bi-modal microstructure. al and (b) lamellar microstructure. FIGURE 2.
Get Price
Lamellar Structure Stability of a Two-Phase α
lamellar microstructure consists of many lamellar colonies with colonies reaching an average size of approximately 30µm. According to the MgCa binary phase diagram shown in Fig. 1 the weight ratio of the primary ¡-Mg phase is estimated to be 9.4 for Alloy A based on the lever rule.
Get Price
Lamellar microstructure and dynamic behavior of diblock
· We investigate the microstructure and dynamic behavior of diblock copolymer / nanoparticle composites under electric fields by a series of cell dynamical system simulations. The study focuses on the effects of two factors i.e. the electric field strength and the polymer / nanoparticle coupling interaction strength. Our simulations demonstrate that the presence of nanoparticles can evidently
Get PriceArchitecture of crossed-lamellar bivalve shells the
· Tridacna derasa shells show a crossed lamellar microstructure consisting of three hierarchical lamellar structural orders. The mineral part is intimately intergrown with 0.9 wt organics namely polysaccharides glycosylated and unglycosylated proteins and lipids identified by Fourier transform infrared spectrometry.
Get PriceMicrostructure and compressive behavior of lamellar Al2O3p
Later on the lamellar Al 2 O 3 p/Al composite was prepared by mechanical-pressure infiltration method. The porous Al 2 O 3 scaffold was put into a steel mold and then preheated at 500 ∘ C for 2 h while the Al matrix alloy was molted at 900 ∘ C. Considering the densification effect and preservation of the integrality of the lamellae microstructure of the scaffolds a pressure of 5 MPa was
Get PriceThe relationships of microstructure and properties of a
· The fully lamellar (FL) microstructure is currently regarded as the most attractive because the overall balance of properties is more suitable for high-temperature structures and the combination of yield strength fracture toughness and creep resistance is markedly better than the duplex or nearly gamma microstructural forms . This kind of microstructure can be mainly characterized by microstructural parameters such as grain size and lamellar
Get Price
Lamellar Structure Stability of a Two-Phase α
lamellar microstructure consists of many lamellar colonies with colonies reaching an average size of approximately 30µm. According to the MgCa binary phase diagram shown in Fig. 1 the weight ratio of the primary ¡-Mg phase is estimated to be 9.4 for Alloy A based on the lever rule.
Get PriceMechanical Properties of the Ti2AlNb Intermetallic A
· Bimodal lamellar microstructure possesses mechanical property values (ductility strength and fracture toughness) that are in between of fully lamellar and duplex (equiaxed with lamellar O phase in B2 matrix) microstructures 52 54 . From these three microstructures the lamellar structure has good creep resistance and fracture toughness but
Get PriceMicrostructure and compressive behavior of lamellar Al2O3p
Later on the lamellar Al 2 O 3 p/Al composite was prepared by mechanical-pressure infiltration method. The porous Al 2 O 3 scaffold was put into a steel mold and then preheated at 500 ∘ C for 2 h while the Al matrix alloy was molted at 900 ∘ C. Considering the densification effect and preservation of the integrality of the lamellae microstructure of the scaffolds a pressure of 5 MPa was
Get Price
Static coarsening behaviour of lamellar microstructure in
· Based on image analysis the average lamellar thickness 1 (1 The as-SLMed Ti-6Al-4V has an acicular martensitic microstructure and the thickness of acicular martensite is regarded as initial lamellar width (d 0).) is approximately at 460 nm which is slightly higher than the value reported at 240 nm for as-SLMed Ti-6Al-4V in Ref. .
Get Price
Mechanical Properties of the Ti2AlNb Intermetallic A
· Bimodal lamellar microstructure possesses mechanical property values (ductility strength and fracture toughness) that are in between of fully lamellar and duplex (equiaxed with lamellar O phase in B2 matrix) microstructures 52 54 . From these three microstructures the lamellar structure has good creep resistance and fracture toughness but
Get Price
Lamellar Microstructure Scientific.Net
The lamellar microstructure coarsening may induce property degradation of materials when the working temperature is high especially for the aero-engine turbine blades. At the same time the reliability of the structure will decreases dramatically during long term working.
Get PriceFormation of Aragonite Crystals in the Crossed Lamellar
· The crossed lamellar microstructure is the most commonly formed shell structure in mollusks. Although the mechanical properties and the architecture of the crossed lamellar microstructure have been extensively studied its formation mechanisms are largely unknown.
Get PriceBridging microstructure and crystallography with the
In a lamellar pearlite microstructure it is well familiar that the process of crack initiation begins with the inhomogeneous and intense shear band formation in coarse pearlite and homogeneous deformation in fine pearlite 23 27 .
Get Price
Lamellar microstructure and dynamic behavior of diblock
· We investigate the microstructure and dynamic behavior of diblock copolymer / nanoparticle composites under electric fields by a series of cell dynamical system simulations. The study focuses on the effects of two factors i.e. the electric field strength and the polymer / nanoparticle coupling interaction strength. Our simulations demonstrate that the presence of nanoparticles can evidently
Get Price
Fibrous/lamellar microstructure in polyethylene Semantic
A shish-kebab microstructure consisting of both fibrillar and lamellar crystals has been observed with transmission electron microscopy in polyethylene crystallized from the melt. The parallel fibrillar crystals are aligned at right angles to closely spaced lamellar crystals. The lamellar crystals were grown epitaxially on a few fibrillar crystals obtained by shearing a solution which preceded
Get Price
