首页|Unveiling the correlation between anomalous hardening and grain boundary diffusional transformation in ω single-phase nano-grained Ti-Fe alloy

Unveiling the correlation between anomalous hardening and grain boundary diffusional transformation in ω single-phase nano-grained Ti-Fe alloy

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Unveiling the correlation between anomalous hardening and grain boundary diffusional transformation in ω single-phase nano-grained Ti-Fe alloy
A metastable ω single-phase nanograined(NG)Ti-Fe alloy was synthesized using laser inert-gas conden-sation(IGC).Upon being annealed at 360 ℃,the NG Ti-Fe alloy exhibited a remarkable ultra-hardening,increasing the hardness from 4.7 to 8.6 GPa.Subsequent findings revealed an unexpected hardness en-hancement,rising from 6.6 GPa at 420 ℃ to 7.6 GPa at 460 ℃,despite the occurrence of grain growth.In-depth investigations into the strengthening mechanisms of the NG Ti-Fe alloy were conducted using in-situ synchrotron high-energy X-ray diffraction(XRD)and transmission electron microscopy(TEM).The comprehensive analysis unveiled that the diffusion-controlled structure evolution during annealing played a pivotal role in enhancing the alloy's mechanical properties.This study not only presents the synthesis of a novel metastable alloy but also provides valuable insights into the intricate relationship between diffusion-controlled structure evolution and the resulting superior mechanical properties.

Laser-inert gas condensationNanograined Ti-Fe alloyPhase transformationDislocationsStrengthening

Shangshu Wu、Zongde Kou、Song Tang、Si Lan、Qingquan Lai、Junjie Wang、Jinru Luo、Xuefeng Xie、Rong Huang、Guiyuan Zheng、Gerhard Wilde、Tao Feng

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Herbert Gleiter Institute of Nanoscience,School of Material Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

Suzhou Laboratory,Suzhou 215123,China

Key Laboratory for Light-weight Materials,Nanjing Tech University,Nanjing 211816,China

Xi'an Rare Metal Materials Institute Co.Ltd,Xi'an 710016,China

State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China

Weihai Langu Institute for Materials Analysis Co.Ltd.,Weihai 264207,China

Institute of Materials Physics,University of Muenster,Wilhelm-Klemm Str.10,Muenster,48149,Germany

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Laser-inert gas condensation Nanograined Ti-Fe alloy Phase transformation Dislocations Strengthening

2024

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子:0.657
ISSN:1005-0302
年,卷(期):2024.203(36)