High temperature corrosion of laser additively manufactured CoNiCrAlY

He, Bin; Su, Chang; Xie, Yongmin; Zhang, Bangyan; Wang, Zhitai; Xiao, Peng

doi:10.1016/j.corcom.2022.04.003

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…As the study of oxidation behavior for LWHEAs is limited, other series of high entropy alloys are also included in Figure 5. The LWHEAs of HE and LE samples are located at the bottom left in the figure (star shape, circled in the rose red dash line), which infers that HE and LE bulks own lower density (<5.2 g cm −3 ) as well as lower oxidation rate than most of the alloys presented by other studies, [ 8,24–32 ] especially for the reported HEAs with density below 6.0 g cm −3 . In particular, the LE bulk with shorter oxidation time (≤12 h, the solid red star in the circle) exhibits an oxidation rate lower than that of Ti64 alloy and similar density, making LE alloy own a great potential in aeroengine hot applications where lightweight and excellent antioxidation resistance are required.…”

Section: Resultsmentioning

confidence: 51%

Oxidation behavior of lightweight Al₂NbTi₃V₂Zr high entropy alloy at 1000°C

Tan,

Zhi,

Pei

et al. 2024

Materials & Corrosion

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Lightweight high entropy alloy (LWHEA) has great potential in aeroengine hot component applications. Anticorrosion property of LWHEA at high temperatures is one of the key determining factors. In this study, an LWHEA containing Al, Nb, Ti, V, and Zr elements with a molar ratio of 2: 1: 3: 2: 1 was designed and prepared by low energy (LE) and high energy (HE) mechanical milling followed by vacuum hot pressing. The sintered LE alloy consisted of a simple cubic matrix and α intermetallic while the BCC matrix along with α and β intermetallic phases were observed in HE alloy. The oxidation of LE and HE at 1000°C for 48 h was mainly concentrated on α and β phases, and the resultant oxides were ZrO2 and TiO2. Weight gain curve of HE sample within oxidation time of 48 h followed the parabolic law while a two‐stage parabola was found in LE bulk. The steady‐state oxidation of α precipitate was dominant within 12 h and showed a preferential oxidation mode. High temperature induced simple cubic matrix to stable BCC phase transformation and thus LE alloy with longer oxidation time and HE exhibited a similar uniform oxidation. The oxidation rate of the alloy is related to the content of α and β phases.

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Section: Resultsmentioning

confidence: 51%