低塑性加工对定向凝固镍基合金DZ125高温氧化性能的影响

doi:10.11896/cldb.19070220

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Abstract In this work, the low-plasticity burnishing (LPB) was employed to study the high temperature oxidation properties of the directionally solidified nickel-based superalloy DZ125. Microstructure analysis revealed that after the LPB process the microstructure of the surface layer changed from pristine columnar crystal to nanocrystalline, with an average grain size of about 10 nm. The surface oxide of LPB samples after high-tempe-rature oxidation at 950 ℃ was mainly alumina (Al₂O₃), which has better oxidation resistance than chromium oxide (Cr₂O₃). The oxide film obtained by LPB is relatively dense and uniform. Furthermore, analysis of the cross section of the specimen by EDS reveals that the LPB sample shows obvious internal-oxidation, with thicker oxide layer.

Key words： directionally solidification nickel-based superalloy DZ125 low-plasticity burnishing (LPB) high-temperature oxidation

Published: 26 April 2020

CLC number:

TG172.3

Fund:This work was financially supported by the National Key Research and Development Program of China (2016YFF0203301).

Corresponding Authors: Hongyun Luo, the professor of Beijing University, Ph.D. tutor. The main research directions: (ⅰ) preparation of (ultrafine and nano) material and its damage mechanism, characterization, monitoring; (ⅱ) low plasticity processing nano-gradient material surface integrity; (ⅲ) biological materials and biomimetic materials.

About author:: Wenbin Mahas studied at Beihang University since September 2016, mainly engaged in the study of environmental corrosion and fatigue properties of nickel-based superalloys.

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	MA Wenbin
	GUO Jingjing
	LUO Hongyun
	TANG Jun
	YANG Xiaoguang

Cite this article:

MA Wenbin,GUO Jingjing,LUO Hongyun, et al. Effect of Low Plastic Processing on High Temperature Oxidation Property of Directionally Solidified Nickel-based Superalloy DZ125[J]. Materials Reports, 2020, 34(10): 10093-10097.

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http://www.mater-rep.com/EN/10.11896/cldb.19070220 OR http://www.mater-rep.com/EN/Y2020/V34/I10/10093

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