研究目的
Investigating the evolution of the structural-phase state and mechanical properties of the VZh159 alloy fabricated by selective laser melting after various types of thermal exposure and hot isostatic pressing.
研究成果
The VZh159 alloy fabricated by selective laser melting exhibits high mechanical properties and isotropy, with the segregation of σ-phase particles not significantly affecting its plastic and strength characteristics. The alloy's long-term strength after high-temperature exposure matches that of its deformed counterpart, making it suitable for applications requiring high-temperature resistance.
研究不足
The study is limited to the VZh159 alloy and its behavior under specific thermal and mechanical conditions. The findings may not be directly applicable to other alloys or different processing conditions.
1：Experimental Design and Method Selection:
The study involves the selective laser melting (SLM) of the VZh159 alloy, followed by various thermal exposures and hot isostatic pressing (HIP) to study the evolution of its structural-phase state and mechanical properties.
2：Sample Selection and Data Sources:
Samples of the VZh159 alloy were prepared by SLM and subjected to different thermal treatments and HIP.
3：List of Experimental Equipment and Materials:
The study utilized selective laser melting equipment, hot isostatic pressing apparatus, and transmission electron microscopy for analysis.
4：Experimental Procedures and Operational Workflow:
The alloy was subjected to long-term exposure at 800 and 900°C for 500 h, followed by mechanical testing to evaluate short-term and long-term strength.
5：Data Analysis Methods:
The phase composition and morphology were analyzed using transmission electron microscopy and X-ray spectral microanalysis.
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