Martensitic Transformation Characteristics

Kim, Hee Young; Miyazaki, Shuichi

doi:10.1016/b978-0-12-809401-3.00001-x

Cited by 3 publications

(5 citation statements)

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“…The agreement between the literature and the current work suggest that all β-Ti alloys should follow the relationships represented in Figure 12 during the phase transformations. These relation- [4], Ti-Fe alloys [5], Ti-Mo alloys [6], Ti-Ta alloys [7], and Ti-Nb alloys [7].…”

Section: Elementmentioning

confidence: 97%

“…In addition to the relationships shown in Figure 1, the β-phase lattice parameter (aβ) is related to Mo-Eq. (as well as the average radius and Md) as aβ decreases with increasing Mo, Cr, and Fe content [4][5][6], increases with increasing Nb contents between 5 and 22 at.% [7], and remains relatively constant for Nb contents between 22 and 35 at.% [8].…”

Section: Introductionmentioning

confidence: 94%

“…The effect of a β on the α and ω phases is discussed in detail below. [4], Ti-Fe alloys [5], Ti-Mo alloys [6], Ti-Ta alloys [7], and Ti-Nb alloys [7].…”

Section: Elementmentioning

confidence: 99%

“…Understanding the evolution of the lattice parameters of each phase during the phase Figure 1. The relationship between Mo-Eq, average atomic radius, and average electron d-shell energy (Md) for the β-Ti alloys Ti-Cr-Nb [4], Ti-Fe [5], Ti-Mo [6], and Ti-Nb [7].…”

Section: Introductionmentioning

confidence: 99%

“…The β-phase lattice parameters (a β values) as a function of Mo-Eq (top), average atomic radius (middle), and average Md (bottom). Data were taken from this work and work involving Ti-Cr-Nb alloys[4], Ti-Fe alloys[5], Ti-Mo alloys[6], Ti-Ta alloys[7], and Ti-Nb alloys[7].…”

mentioning

confidence: 99%

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Lattice Parameter Evolution during the β-to-α and β-to-ω Transformations of Iron- and Aluminum-Modified Ti-11Cr(at.%)

Ballor,

Poplawsky,

Devaraj

et al. 2024

Crystals

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β-titanium (β-Ti) alloys are useful in diverse industries because their mechanical properties can be tuned by transforming the metastable β phase into other metastable and stable phases. Relationships between lattice parameter and β-Ti alloy concentrations have been explored, but the lattice parameter evolution during β-phase transformations is not well understood. In this work, the β-Ti alloys, Ti-11Cr, Ti-11Cr-0.85Fe, Ti-11Cr-5.3Al, and Ti-11Cr-0.85Fe-5.3Al (all in at.%), underwent a 400 °C aging treatment for up to 12 h to induce the β-to-ω and β-to-α phase transformations. Phase identification and lattice parameters were measured in situ using high-temperature X-ray diffraction. Phase compositions were measured ex situ using atom probe tomography. During the phase transformations, Cr and Fe diffused from the ω and α phases into the β matrix, and the β-phase lattice parameter exhibited a corresponding decrease. The decrease in β-phase lattice parameter affected the α- and ω-phase lattice parameters. The α phase in the Fe-free alloys exhibited α-phase c/a ratios close to those of pure Ti. A larger β-phase composition change in Ti-11Cr resulted in larger ω-phase lattice parameter changes than in Ti-11Cr-0.85Fe. This work illuminates the complex relationship between diffusion, composition, and structure for these diffusive/displacive transformations.

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Section: Elementmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 94%

“…The effect of a β on the α and ω phases is discussed in detail below. [4], Ti-Fe alloys [5], Ti-Mo alloys [6], Ti-Ta alloys [7], and Ti-Nb alloys [7].…”

Section: Elementmentioning

confidence: 99%