Three-Dimensional Microstructure and Mechanical Properties of CX Stainless Steel Formed by Selective Laser Melting

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2025-01-16 DOI:10.1007/s12540-024-01879-3

Yang Man, Jian Haigen, Fang Wu, Liu Yi

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Abstract

In order to explore the microstructure and mechanical properties of CX stainless steel formed by selective laser melting, the chemical composition, microstructure and properties of the samples were analyzed by optical microscope, X-ray diffractometer, scanning electron microscope and backscattered electron diffraction technology. The results show that the temperature gradient and high cooling rate have an important influence on the microstructure and anisotropy of SLM formed CX stainless steel. CX stainless steel is mainly composed of a large amount of martensite structure and a small amount of austenite phase struct-ure, and the three-dimensional microstructure is obviously different. In the three-dimensional section, the texture of < 110 > crystal orientation in XOZ plane is the strongest, followed by YOZ, and the specific orientation of grains in XOY plane is the weakest. In comparison, the XOZ plane has the best mechanical properties, and its tensile strength, yield strength, elongation and microh-ardness reach 1045.29 MPa, 829.51 MPa, 16.70% and 364.89 HV, respectively.

Graphical Abstract

Abstract Image

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选择性激光熔化成形CX不锈钢的三维组织与力学性能

为了探讨选择性激光熔化成形的CX不锈钢的显微组织和力学性能，采用光学显微镜、x射线衍射仪、扫描电镜和背散射电子衍射技术对样品的化学成分、显微组织和性能进行了分析。结果表明，温度梯度和高冷却速率对SLM成形CX不锈钢的组织和各向异性有重要影响。CX不锈钢主要由大量的马氏体组织和少量的奥氏体相组织组成，其三维显微组织明显不同。在三维截面上，XOZ平面的<； 110 >；晶体取向织构最强，其次是YOZ，晶粒在XOY平面的特定取向最弱。其中XOZ平面力学性能最好，抗拉强度、屈服强度、伸长率和显微硬度分别达到1045.29 MPa、829.51 MPa、16.70%和364.89 HV。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.