Phase transformation of the Ti-5553 titanium alloy subjected to rapid heating

被引：8

作者：

Chanfreau, Nicolas ^{[1
]}

Poquillon, Dominique ^{[1
]}

Stark, Andreas ^{[2
]}

Maawad, Emad ^{[2
]}

Mareau, Charles ^{[3
]}

Dehmas, Moukrane ^{[1
]}

机构：

[1] Univ Toulouse, INP ENSIACET, CNRS, CIRIMAT, 4 Allee Emile Monso,BP44362, F-31030 Toulouse 4, France

[2] Helmholtz Zentrum Geesthacht, Inst Mat Phys, Max Plank Str 1, D-21502 Geesthacht, Germany

[3] Lab Angevin Mecan Proc & InnovAt, 2 Blvd Ronceray, Angers, France

来源：

JOURNAL OF MATERIALS SCIENCE | 2022年 / 57卷 / 09期

关键词：

IN-SITU OBSERVATIONS; BETA-PHASE; ALPHA-PHASE; TEMPERATURE; EVOLUTION; KINETICS; MICROSTRUCTURE; TI-6AL-4V; EXPANSION; ELEMENTS;

D O I：

10.1007/s10853-022-06959-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The alpha -> beta phase transformation upon heating in the Ti-5553 alloy with lamellar-nodular bimodal microstructure was tracked in situ with high energy X-ray diffraction. Rapid heating at 10, 50 and 100 degrees C s(-1) from room temperature to 1050 degrees C was tested. Phase transformation on heating was studied by a combined analysis of the microstructural features that provides estimates of mass fractions, mean lattice parameters and full width at half maximum for the two phases. In comparison with equilibrium conditions, the experimental mass fractions reveal a shift of the transformation domain toward high temperatures when the heating rate increases. Also, the dissolution of the alpha phase is largely impacted by its morphology, the transformation being faster for alpha lamellae. The combined analysis of mean lattice parameters and full width at half maximum suggests that the alpha -> beta phase transformation on heating is diffusion controlled. The beta phase therefore inherits the solute content of the adjacent parent alpha phase, leading to chemical heterogeneities in the beta phase regardless of the heating rate.

引用

页码：5620 / 5633

页数：14

共 56 条

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