2017年9月17日 · Microstructure and phase composition of the alloys after annealing at 1200 °C were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD analysis was performed using RIGAKU diffractometer and …

2022年1月1日 · Micromorphology and XRD patterns of B2–FeAl and B2–NiAl powder are carried out and the results are shown in Fig. 1. According to Fig. 1 (a) and (b), the FeAl powder after heat treatment is mainly composed of FeAl intermetallic compounds with B2 structure and a small amount of α-Al 2 O 3 and AlFe 3 C 0.5.

2020年9月15日 · This present work simulated the coherent BCC/B2 microstructures existing in body-centered-cubic (BCC)-based Al-Ni-Co-Fe-Cr high entropy alloys (HEAs) in light of the phase-field method. These coherent BCC/B2 microstructures contain spherical or cuboidal nanoprecipitates, or exhibit a weave-like spinodal decomposition in experiments.

2024年12月4日 · The x-ray diffraction (XRD) and scanning electron microscopy (SEM) characterizations of the initial composition, Al 25 Hf 25 Nb 25 Ti 25 in the as-cast condition, show the single–B2-phase formation (Fig. 3, A and B). This alloy exhibits high strength, with a compressive σ YS ~ 1.7 GPa, but lower ε f ~ 2% .

The XRD results indicate the presence of superlattice reflections, substantiating the presence of the B2 phase in all the alloys. The order parameter, L, was calculated until the ternary alloys and found to be highest for Al(CoFe) ( L = 0.96) and is lowest for Al(FeNi) ( L = 0.74).

2020年5月4日 · Figure 3 presents the measured XRD patterns of the synthesized alloys, which show that the Cr–Fe rich1 alloy contains the B2 (100) reflection, whereas the Cr–Fe rich2 alloy contains less of this phase. Based on whole-pattern fitting, the content of the B2 phase in the Cr–Fe rich1 and Cr–Fe rich2 alloys is 31 ± 2 and 24 ± 3 vol ...

电弧熔炼样品底部呈现B2与γ相的层片组织,该区域的凝固组织较为均匀,Al的偏析得到了有效抑制,B2相的体积分数减小,表明冷却速率的增加有利于Nb元素的扩散,因此,B2相的相对尺寸减小。

2024年11月2日 · Introducing B2 ordering can effectively improve the mechanical properties of lightweight refractory high-entropy alloys (LRHEAs). However, (Zr, Al)-enriched B2 precipitates generally reduce the ductility because their ordering characteristic is …

These X- ray diffraction patterns reflect the crystal characters of martensite phases with their crystallographic planes. Moreover, deformation induced bcc martensite (a') peak intensity arises in...

2023年9月15日 · Although the XRD results demonstrate that it is a single BCC structure, surprisingly, diffraction patterns reveal superlattice reflections marked with red frame that indicate an ordered B2 phases at the position of 3 and 6.