Investigation of Microstructure and Tensile Properties of TC17 Alloy Fabricated by Electron Beam Wire Deposition

YANG Yang; WU Fan; CHEN Wei

doi:10.16080/j.issn1671-833x.2020.13.024

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Investigation of Microstructure and Tensile Properties of TC17 Alloy Fabricated by Electron Beam Wire Deposition

更新时间：2025-10-30

- Investigation of Microstructure and Tensile Properties of TC17 Alloy Fabricated by Electron Beam Wire Deposition
- Aeronautical Manufacturing Technology Vol. 63, Issue 13, Pages: 24-29(2020)
- 作者机构：
  
  中国航空制造技术研究院高能束流加工技术重点实验室,北京,100024
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2020.13.024
  CLC：
- Published：2020
- 稿件说明：
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杨洋，吴凡，陈玮. 电子束熔丝成形TC17钛合金显微组织与拉伸性能研究[J]. 航空制造技术, 2020, 63(13): 24-29.

YANG Yang, WU Fan, CHEN Wei. Investigation of Microstructure and Tensile Properties of TC17 Alloy Fabricated by Electron Beam Wire Deposition. Aeronautical Manufacturing Technology, 2020, 63(13): 24-29.
杨洋，吴凡，陈玮. 电子束熔丝成形TC17钛合金显微组织与拉伸性能研究[J]. 航空制造技术, 2020, 63(13): 24-29. DOI： 10.16080/j.issn1671-833x.2020.13.024.

YANG Yang, WU Fan, CHEN Wei. Investigation of Microstructure and Tensile Properties of TC17 Alloy Fabricated by Electron Beam Wire Deposition. Aeronautical Manufacturing Technology, 2020, 63(13): 24-29. DOI： 10.16080/j.issn1671-833x.2020.13.024.

摘要

针对电子束熔丝（EBWD）成形 TC17 钛合金开展了显微组织调控与力学性能研究。成形态 EBWD TC17 钛合金的成分均匀性较好，具有沿 z 方向外延生长并贯穿多个沉积层的粗大 β 柱状晶组织，柱状晶内部为细密的网篮状组织。经过热等静压后，β 柱状晶内部呈现粗短棒状 α 网篮组织。经过固溶时效处理后，β 基体中同时存在粗短棒状 α 相和细小的次生 α 相。成形态 EBWD TC17 材料的抗拉强度为 935MPa，延伸率为 9.0%；热等静压态材料的抗拉强度为 904MPa，延伸率为 18.0% ；二重固溶 + 时效后，由于析出的细小次生 α 相起到了沉淀强化的作用，材料的抗拉强度较热等静压态提高了 18%（至 1066MPa），但塑性显著下降（至 7.5%），其拉伸断口的韧窝数量也大幅减少。

Abstract

The microstructure and tensile properties of TC17 alloy fabricated by electron beam wire deposition (EBWD) were investigated. The as-built EBWD TC17 alloy exhibited a homogeneous element distribution

and the coarse columnar β grains grew epitaxially through many deposited layers along the z direction. Inside each columnar grain there was fine basket-waved microstructure. After hot isostatic pressing (HIP)

small α rods formed in the β matrix. In the solution treated and aged material

rod-like α phase and fine α precipitates both existed. The tensile strength and elongation of as-built EBWD TC17 alloy were 935MPa and 9.0%

respectively. The tensile strength and elongation after HIP were 904MPa and 18.0%. After solution treating and aging

the tensile strength increased 18% (to 1066MPa) compare with the HIP condition due to the strengthening effect of fine α precipitates. However

the elongation decreased significantly (to 7.5%) and the ductile dimples on the tensile fracture surface also decreased.

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