Microstructural and Strength Changes During Multi-Axial Forging of Ta-10 wt% W and its Comparison with Ta

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2025-01-28 DOI:10.1007/s12540-025-01895-x

A. Kedharnath, Rajeev Kapoor, Apu Sarkar

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Abstract

The study aims to bring out the effect of microstructural modification and W addition in TaW on the strength as these alloys find applications in ballistics, high temperature and corrosive environments. Coarse-grained tantalum-10 wt% tungsten (Ta-10 W) was multi-axially forged (MAF) to 3, 6, and 9 passes corresponding to equivalent strains of 2.4, 4.8 and 7.2, respectively. The MAF Ta-10 W samples were characterized for their microstructural and mechanical properties. The average grain size decreased from 20 μm in the starting material to 3 μm after 3 passes and to 0.38 μm after 9 passes. The fraction of high angle grain boundaries (\(\:{f}_{hagb}\)) increased from 0.26 (3 passes) to 0.56 (9 passes) and the fraction of recrystallized grains (\(\:{f}_{recry}\)) increased from 0.31 (3 passes) to 0.92 (9 passes). The yield stress increased from 964 MPa after 3 passes to 1202 MPa after 9 passes. It was found that the contribution from GBs as compared to that from dislocations was lower after 3 passes than after 9 passes. The addition of tungsten to tantalum increased the flow locus during MAF and yield stress of MAF samples to almost double as compared to Ta. As compared to MAF Ta, MAF Ta-10 W showed finer grains, higher \(\:{f}_{hagb}\), and higher \(\:{f}_{recry}\).

Graphical Abstract

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ta10 wt% W多轴锻造过程中组织与强度变化及与Ta的比较

在弹道、高温和腐蚀等环境中，研究了合金中加入W和组织改性对合金强度的影响。粗晶钽-10吨% tungsten (Ta-10 W) was multi-axially forged (MAF) to 3, 6, and 9 passes corresponding to equivalent strains of 2.4, 4.8 and 7.2, respectively. The MAF Ta-10 W samples were characterized for their microstructural and mechanical properties. The average grain size decreased from 20 μm in the starting material to 3 μm after 3 passes and to 0.38 μm after 9 passes. The fraction of high angle grain boundaries (\(\:{f}_{hagb}\)) increased from 0.26 (3 passes) to 0.56 (9 passes) and the fraction of recrystallized grains (\(\:{f}_{recry}\)) increased from 0.31 (3 passes) to 0.92 (9 passes). The yield stress increased from 964 MPa after 3 passes to 1202 MPa after 9 passes. It was found that the contribution from GBs as compared to that from dislocations was lower after 3 passes than after 9 passes. The addition of tungsten to tantalum increased the flow locus during MAF and yield stress of MAF samples to almost double as compared to Ta. As compared to MAF Ta, MAF Ta-10 W showed finer grains, higher \(\:{f}_{hagb}\), and higher \(\:{f}_{recry}\).Graphical Abstract

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.