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| Research on inclusions in powder metallurgy superalloy－a review |
| QU Jing-long1，2，ZHANG Xue-liang1，2，YANG Shu-feng3，GU Yu1，2，TAO Yu1，2 |
| 1High Temperature Materials Research Institute，CISRI，Beijing 100081，China；2 GAONAAero Material
Co.，Ltd.，Beijing 100081，China；3School of Metallurgical and Ecological Engineering，University of Science
and Technology Beijing，Beijing 100083，China |
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Abstract The research progress on the issue of inclusions in powder metallurgy superalloy at home and abroad is
summarized，including the source，classification，and evaluation of inclusions in powder metallurgy superalloy；
the evolution of inclusion characteristics under different forming processes；the effect of inclusions on low cycle
fatigue life of powder metallurgy superalloy；the technological measures to solve the problem of inclusions；the
methods of life prediction considering inclusion factors，and the mechanism of crack initiation and propagation
caused by inclusion.
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Received: 01 August 2020
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2020, Vol. 30 
