Binary Alloy Phase DiagramThermodynamic AssessmentCalculated Phase DiagramIntroductionBinary Alloy Phase Diagrams, 2nd edition, a comprehensive collection of alloy phase diagrams for 2159 binary systems, was published in 1990 (T.B. Massalski, H. Okamoto, P.R. Subramanian, and L. Kacprzak., ASM ...
图3 AlSc二元合金相图 Fig.3ThephasediagramofAlScbinaryalloy Er元素在Al中的极限固溶度小于005wt%,图 4为AlEr二元合金相图[36]。Er元素加 入AlMg系合金中能够有效地细化合金的铸态晶 粒,增加合金热稳定性,使其再结晶温度提高50℃ 左右 [37-39],晶粒细 化的可能原因是一方面初生的Al3Er粒子在凝固时作为非...
Fig. 4 (a and b) are the phase diagrams of Mg–Pb and Al–Mg binary alloys, respectively [25]. As can be seen from the Mg–Pb binary phase diagram in Fig. 4 (a), with the decrease of temperature, α-Mg is precipitated firstly, then Mg2Pb is precipitated in α-Mg, and the ...
According to the Al–Mg binary phase diagram, it can be seen that brittle intermetallic compounds are easily formed between Al and Mg. Therefore, the high-quality and efficient connection of dissimilar Al and Mg metals has always been a technical problem in welding [4, 5]. In recent years,...
The calculated Mg-Gd phase diagram is shown in Fig. 1(b) based on the thermodynamic parameters from WUet al [45]. The Al-Gd binary system was first thermo- dynamically assessed by GROBNER et al [28]. Subsequently, the Al-rich region of this system was reassessed by HACKENBERG et al ...
Binary Systems The Al-Mg phase diagram [ 1998Lia ] has the following intermediate phases: Mg 2 Al 3 (cubic, labeled β), R or (rhombohedral), and Mg 17 Al 12 ( A 12, αMn-type cubic, denoted γ). The Al-Nd phase diagram reassessed with new additional experimental input by [ ...
As expected from the Mg-Al binary phase diagram19,20, interfacial layers (γ and β layers) are readily formed by the diffusion even at relatively low temperatures and are grown with increasing homogenizing temperature or time11,12,24,25. In the H6 sheet, the interfacial layers are grown to...
The Al-Mg-Sr ternary phase diagram was calculated from the optimized thermodynamic properties of the binary systems. Since no reliable ternary data were available, three assumptions were made: no ternary terms were added to the model parameters for the thermodynamic properties of the liquid, no ...
According to the Al–Mg binary diagram, during solidification Al3Mg2 phase particles precipitate[[48], [49], [50], [51], [52], [53], [54]]. The present castings were solidified at a slow rate of 0.15 °C/s. Fig. 3(e) is a TEM micrograph obtained from Al–5%Mg revealing the...
With respect to the temperature and composition of the liquid phase, this reaction is close to the eutectic reaction in the Al-Mg binary system. The addition of Ca and Si to the Al-10% Mg base alloy increases its hardness, reduces its density, and has no negative influence on its ...