Chinese Journal of Mechanical Engineering >

2020 , Vol. 33 >Issue 6: 88 - 88

DOI: https://doi.org/10.1186/s10033-020-00507-6

Smart Materials

Analysis of the Microstructure and Mechanical Properties during Inertia Friction Welding of the Near-α TA19 Titanium Alloy

  • Yanquan Wu ,
  • Chunbo Zhang ,
  • Jun Zhou ,
  • Wu Liang ,
  • Yunlei Li
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  • 1. Research and Development Center, Harbin Welding Ins Company, Harbin 150028, China;
    2. China Academy of Ma and Technology Group Co., Ltd, Beijing 100044, China

收稿日期: 2020-05-12

  修回日期: 2020-10-01

  网络出版日期: 2021-03-12

基金资助

Supported by Natural Science Foundation to Basic Research in Key Areas of Heilongjiang Province of China (Grant No. TD2020E002)

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Analysis of the Microstructure and Mechanical Properties during Inertia Friction Welding of the Near-α TA19 Titanium Alloy

  • Yanquan Wu ,
  • Chunbo Zhang ,
  • Jun Zhou ,
  • Wu Liang ,
  • Yunlei Li
Expand
  • 1. Research and Development Center, Harbin Welding Ins Company, Harbin 150028, China;
    2. China Academy of Ma and Technology Group Co., Ltd, Beijing 100044, China

Received date: 2020-05-12

  Revised date: 2020-10-01

  Online published: 2021-03-12

Supported by

Supported by Natural Science Foundation to Basic Research in Key Areas of Heilongjiang Province of China (Grant No. TD2020E002)

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摘要

The current research of titanium alloy on friction welding process in the field of aero-engines mainly focuses on the linear friction welding. Compared to the linear friction welding, inertial friction welding of titanium alloy still has important application position in the welding of aero-engine rotating assembly. However, up to now, few reports on inertial friction welding of titanium alloy are found. In this paper, the near-alpha TA19 titanium alloy welded joint was successfully obtained by inertial friction welding (IFW) process. The microstructures and mechanical properties were investigated systematically. Results showed that the refined grains within 15?20 μm and weak texture were found in the weld zone due to dynamic recrystallization caused by high temperature and plastic deformation. The weld zone consisted of acicular α′ martensite phase, αp phase and metastable β phase. Most lath-shaped αs and β phase in base metal were transformed into acicular martensite α′ phase and metastable β phase in thermo-mechanically affected zone and heat affected zone. As a result, the microhardness of welded joint gradually decreased from the weld zone to the base metal. Tensile specimens in room temperature and high temperature of 480 ℃ were all fractured in base metal illustrating that the inertia friction welded TA19 titanium alloy joint owned higher tensile strength compared to the base metal.

关键词： Inertia friction welding; TA19; Microstructure; Mechanical property; Texture

本文引用格式

Yanquan Wu , Chunbo Zhang , Jun Zhou , Wu Liang , Yunlei Li . Analysis of the Microstructure and Mechanical Properties during Inertia Friction Welding of the Near-α TA19 Titanium Alloy[J]. Chinese Journal of Mechanical Engineering, 2020 , 33(6) : 88 -88 . DOI: 10.1186/s10033-020-00507-6

Abstract

The current research of titanium alloy on friction welding process in the field of aero-engines mainly focuses on the linear friction welding. Compared to the linear friction welding, inertial friction welding of titanium alloy still has important application position in the welding of aero-engine rotating assembly. However, up to now, few reports on inertial friction welding of titanium alloy are found. In this paper, the near-alpha TA19 titanium alloy welded joint was successfully obtained by inertial friction welding (IFW) process. The microstructures and mechanical properties were investigated systematically. Results showed that the refined grains within 15?20 μm and weak texture were found in the weld zone due to dynamic recrystallization caused by high temperature and plastic deformation. The weld zone consisted of acicular α′ martensite phase, αp phase and metastable β phase. Most lath-shaped αs and β phase in base metal were transformed into acicular martensite α′ phase and metastable β phase in thermo-mechanically affected zone and heat affected zone. As a result, the microhardness of welded joint gradually decreased from the weld zone to the base metal. Tensile specimens in room temperature and high temperature of 480 ℃ were all fractured in base metal illustrating that the inertia friction welded TA19 titanium alloy joint owned higher tensile strength compared to the base metal.

Key words： Inertia friction welding; TA19; Microstructure; Mechanical property; Texture

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