Transitions of deformation mechanisms in new metastable β-titanium Ti-1500G alloy

Yongqiang Ye; Yuanfei Han; Siyuan Zhang; Jianwen Le; Fu Chen; Jiaming Zhang; Chunyu Shen; Guangfa Huang; Shewei Xin; Weijie Lu; Di Zhang

Materials & Design (Mar 2025)

Transitions of deformation mechanisms in new metastable β-titanium Ti-1500G alloy

Yongqiang Ye,
Yuanfei Han,
Siyuan Zhang,
Jianwen Le,
Fu Chen,
Jiaming Zhang,
Chunyu Shen,
Guangfa Huang,
Shewei Xin,
Weijie Lu,
Di Zhang

Affiliations

Yongqiang Ye: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yuanfei Han: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming, Shanghai 200240, China; Corresponding authors at: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Siyuan Zhang: Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
Jianwen Le: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Fu Chen: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Jiaming Zhang: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Chunyu Shen: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Guangfa Huang: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Shewei Xin: Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
Weijie Lu: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming, Shanghai 200240, China; Corresponding authors at: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Di Zhang: The State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Journal volume & issue: Vol. 251
p. 113663

Abstract

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Ultrahigh-strength titanium alloy (≥1250 MPa) innovation calls for an integrated framework combining novel deformation processing and microstructural control. However, a confluence of constitutive model and the deformation behavior of a new β-metastable titanium alloys (Ti-4Al-4Mo-4 V-5Cr-2Zr-1Nb, Ti-1500G) remained ambiguous, making the optimization of precise processing parameters is difficult clarified. An integrated response of the flow stress caused by multiple mechanisms initiated softening and work hardening was characterized using a strain-compensated constitutive model, including shear bands, dynamic recovery and dynamic recrystallization (DRX). Particular attention in this work was placed on in-depth understanding the thermal processing sensitivity of deformation mechanisms transformation. A two-dimensional deformation-mechanism map (DMM) as a function of temperature and strain rate was creatively proposed on the basis of energy dissipation efficiency mechanisms. The transition of deformation mechanisms was attributed to the decreasing thermal activation energy from α + β phase region (413.78 kJ/mol) to β phase region (219.24 kJ/mol), accompanied by dynamic phase transformation and activated dynamic α globularization. Otherwise, low strain rates promote α phases-dislocation interactions to accelerate the DRX grains nucleation. The DMM with various physical parameters is an efficient approach for guiding the thermomechanical processing of ultrahigh-strength titanium alloy large-scale components to reduce cracking tendency.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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