Shot-Peening Time Effect on the Mechanical Properties of AISI 4340 Steel

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-08-13 DOI:10.1007/s12540-024-01774-x

Young Hoon Jung, Beom Joon Kim, Hyogeon Kim, Seong Hwan Kim, Sang-Yun Shin, Seok Gyu Lee, Minjae Baek, Dong Jun Lee, In-Chul Choi, Jung Gi Kim

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Abstract

Although the mechanical properties of shot-peened metallic alloys need to be explored carefully by changing shot-peening parameters, the mechanical properties of shot-peened AISI 4340 steel were not investigated well. In this study, the changes in the mechanical properties of shot-peened AISI 4340 steels with the shot-peening time are investigated. In the early stage, shear strain dissolves the Mo-rich carbides in the matrix, which reduces the mechanical properties of the shot-peened sample. In the later stage, sufficient shear strain induces grain refinement at the surface region, and the strength-ductility enhancement occurs owing to back-stress hardening evolution. The results show the shear straining during shot peening does not always enhance the strength of metallic alloys due to the dissolution of precipitates. Thus, the mechanical properties of shot-peened AISI4340 steel depends on the shot-peening time and an optimal processing time is required for obtaining a high strength–ductility combination.

Graphical Abstract

Abstract Image

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喷丸时间对 AISI 4340 钢机械性能的影响

尽管需要通过改变喷丸强化参数来仔细探究喷丸强化金属合金的机械性能，但对喷丸强化 AISI 4340 钢的机械性能研究并不深入。本研究探讨了喷丸强化 AISI 4340 钢的力学性能随喷丸强化时间的变化。在早期阶段，剪切应变会溶解基体中的富钼碳化物，从而降低喷丸强化试样的机械性能。在后期阶段，足够的剪切应变会诱导表面区域的晶粒细化，由于背应力硬化演变，强度-电导率会提高。结果表明，由于析出物的溶解，喷丸强化过程中的剪切应变并不总能提高金属合金的强度。因此，喷丸强化 AISI4340 钢的机械性能取决于喷丸强化时间，要获得高强度-电导率组合，需要最佳的加工时间。

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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.