Hcp to bcc transformation

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August undefined, 2024

WebThe hcp–bcc–liquid triple point of beryllium is found at 165 GPa and 4559 K. ... DFT simulations discovered that beryllium would undergo the hcp–bcc structural transformation with a negative Clapeyron slope in the multi-megabar region. 15–17,19,20 The principal and secondary Hugoniot profiles were also studied via DFT 15–18,20,21 over ... WebFeb 1, 2024 · For the fcc→bcc transformation, the formed bcc structure has a lattice constant of 0.286 nm at the strain ε = 12.4%, and for the bcc→hcp transformation, the …

Fcc→bcc→hcp successive phase transformations in the strained …

WebJul 15, 2016 · Since transformation is diffusionless, phase fronts propagate through a crystal with great speed that can approach the speed of sound. We have observed a … WebJun 21, 2005 · The U.S. Department of Energy's Office of Scientific and Technical Information substitute function python

Toward better understanding of the high-pressure structural ...

WebSep 29, 2024 · 원자성 고체와 이온결합 화합물은 같은 방식으로 입자 (이온 or 원자)를 배열합니다. 공통적으로 입자라고 칭하겠습니다. 입자가 배열되는 방식은 크게 원시 입방 (primitive cubic), 체심 입방 (body-centered cubic), 조밀 쌓임 구조 (cubic close packing, ccp)로 구분됩니다. 정말 ... WebAug 15, 2015 · DOI: 10.1016/J.ACTAMAT.2015.05.034 Corpus ID: 137592887; The mechanism of bcc α′ nucleation in single hcp ε laths in the fcc γ → hcp ε → bcc α′ martensitic phase transformation WebFeb 8, 2024 · And the ε (hcp) → α′ (bcc) transformation is executed by continuous lattice distortion at the single ε-plate, while by two-shearing at the intersection of two ε-plates. … paint colors for fireplace

[cond-mat/0209530] Mechanism for BCC to HCP Transformation ...

(PDF) On the Mechanism of the BCC-HCP Transformations in

WebOct 17, 2016 · The first developed potential (Ti1) reproduces the hcp-bcc transformation and melting temperatures and is suitable for the simulation of phase transitions and bcc Ti. Two other potentials (Ti2 and Ti3) correctly describe defect properties and can be used to simulate plasticity or radiation damage in hcp Ti. The fact that a single embedded atom ... WebAs it is already known, the fcc-to-hcp transformation process is promoted by gliding of multiple Shockley partials of 1/6 fcc type on alternate {111} fcc planes that depends on crystal orientation . The stacking fault energy (SFE) of these alloys is lower than 20 mJ/m 2 with consequences on the susceptibility to nano-sized twins in the ... paint colors for front door and shutters paint colors for foyer and hallway

"WebAug 21, 2024 · Nucleation mechanism for hcp → bcc phase transformation in shock-compressed Zr journal, April 2024. Zong, Hongxiang; He, Ping; Ding, Xiangdong; ... to body-centered-cubic (bcc) transformation and melting observed using in-situ x-ray diffraction (XRD) measurements, we present longitudinal sound speed results and their analysis in … " - Hcp to bcc transformation

Hcp to bcc transformation

In-situ laser ultrasonic measurement of the hcp to bcc …

WebThe hcp–bcc–liquid triple point of beryllium is found at 165 GPa and 4559 K. ... DFT simulations discovered that beryllium would undergo the hcp–bcc structural … WebSep 23, 2002 · Mechanism for BCC to HCP Transformation: Generalization of the Burgers Model. S.G. Srinivasan, D.M. Hatch, H.T. Stokes, A. Saxena, R.C. Albers, T. Lookman. …

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WebOct 6, 2024 · The present paper proposes a new transformation path from the HCP to the BCC transformation through an intermediate FCC phase. It is noted from recent … WebJun 21, 2005 · Since transformation is diffusionless, phase fronts propagate through a crystal with great speed that can approach the speed of sound. We have observed a …

WebApplying the constructed Ti–Nb potentials, molecular dynamics simulations were conducted to investigate the martensitic transformation of Ti100−xNbx alloys (x = 5, 10…25) from … WebApr 5, 2024 · A similar memory effect for the reverse hcp to bcc transformation has been previously observed under hydrostatic compression. However, the bcc/hcp orientation relationships differ somewhat between dynamic and static compression experiments, implying that the transformation pathway under uniaxial dynamic strain differs from the …

WebFeb 1, 2024 · The bcc–hcp phase transformation occurs either under ramp compression on a ~100 GPa order scenario (i) or upon an increase in the strain-rate scenario (ii). Figure 7. Stress profiles at successive times showing the evolution of the ramp compression, which steepens into a shock wave during its propagation. The width of the P1 wave is used to ... WebApr 22, 2009 · Using density-functional theory, we calculate the potential-energy surface (PES), minimum-energy pathway (MEP), and transition state (TS) versus hydrostatic pressure σ hyd for the reconstructive transformation in Fe from body-centered cubic (bcc) to hexagonal closed-packed (hcp). At fixed σ hyd, the PES is described by coupled …

WebThe DIMT from FCC to body-centered-cubic (BCC) via intermediate HCP resulted in an excellent combination of strength and ductility by high strain-hardening effect. ... The BCC martensite exhibited a thick-plate morphology as a resultant product of stress-induced transformation from low-stability FCC, and the plates had an alternating variant ...

WebFeb 7, 2024 · In 1985, Olijnyk and Holzapfel 4 experimentally observed BCC-HCP transformation in Mg in the range of 50 ± 6 GPa and in 2014, Stinton et al. 5 confirmed this range. However, both works used ... substitute frozen corn for cannedWebDec 22, 2014 · transformation, the whole hcp-to-bcc phase transition can be partitioned into three processes based on the involved phases, i.e. hcp to a 00 transition, a 00 to fco transition, and fco to bcc substitute frozen spinach for fresh spinachWebThe mechanism underlying the BCC-to-HCP transformation in the electronically excited bulk W system is analyzed under the level of electronic structure. It is found that the … paint colors for golden oak cabinetsWebOct 23, 2002 · We apply this method to the study of a pressure driven body-centered cubic (bcc) to hexagonal close-packed (hcp) transformation in titanium. We find a … substitute gelatin sheets for powderWebJul 1, 2016 · Laser ultrasound and EBSD interpret the hcp/bcc phase transformation in cp-Ti. • Grain growth and texture produced variation in velocity during similar treatments. • … substitute gelatin for cornstarchWebThe results show that the fcc-hcp and hcp-bcc transformation will occur in the compression process, and the transition pressures are 61 Gpa and 210 Gpa respectivly. 分子动力学(Molecular Dynamics，MD)模拟是指对于原子核和电子所构成的多体系统，把其中每一个原子核视为在全部其它原子核和电子作用下 ... paint colors for front doors and shuttersWebthe bcc scattering patterns are indexed in Fig. 1(d). The azimuthally smeared peaks are indexed as a group of three spots, which indicates a multiplicity in the bcc unit cells after transformation. Furthermore, the increase in the intensity of the first-order peaks can be explained by the additional contribution from the hcp-to-bcc transformation. paint colors for front porches