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Home > Archive>Volume 48, Issue 12, 2019 >4093-4100. DOI:10.12442/j.issn.1002-185X.20180930
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Study on Microstructure and Properties of Argon Atomization FGH97 P/M Superalloy
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Affiliation:

Shenzhen Wedge Central South Research Institute Co,Ltd

Clc Number:

TG146.1+5

Fund Project:

Guangdong Province Pearl River Talent Plan Project and Shenzhen Science and Technology Innovation Commission Project (project no. KQTD2015032716463668)

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    Abstract:

    Characteristics of microstructure, inclusions, Prior Particle Boundary , Thermally Induced Porosity , defects and several large size disk′s tensile properties, stress rupture life ,low cycle fatigue of a P/M superalloy FGH97, which was made by Argon Atomization (AA) + Hot Isostatic Pressing (HIP)process, were investigated. The results reveal that the grain size of FGH97 material prepared by AA + HIP +Heat Treatment is ASTM 8-9. No continuous network PPB is found, and there is a very small amount of TIP. The size of mostly square γ' is about 200 nm, and grain boundary γ' is 1.5 to 2 μm. No coarse γ' phase and coarse carbides are observed. The average stress rupture time of 650 °C / 980MPa is 449 h. The maximum low cycle fatigue life is 258,909 cycles at 650 ℃, the average cycle reaches 19,014 cycles. The room temperature, 650℃, 750 ℃tensile properties, stress reputure performance at 650 ℃ / 980 MPa and the fracture life of Low cycle fatigue at 650 ℃ meet the FGH97 alloy technical requirements.

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[Yang Jinlong, Zhu Xiaomin, Tan Jianjun, Xiong Jiangying. Study on Microstructure and Properties of Argon Atomization FGH97 P/M Superalloy[J]. Rare Metal Materials and Engineering,2019,48(12):4093~4100.]
DOI：10.12442/j. issn.1002-185X.20180930

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History
  • Received:September 06,2018
  • Revised:November 02,2018
  • Adopted:November 08,2018
  • Online: January 07,2020

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