Effects of Surface Peening on Residual Stress and Microstructure of Nickel-base Alloy 182 and 52 M Welds

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Metals and Materials International Pub Date : 2024-10-26 DOI:10.1007/s12540-024-01824-4

Baosheng Bai, Sungyu Kim, Joonho Moon, Wongeun Yi, Eunsub Yun, Chi Bum Bahn

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Abstract

The effects of surface peening techniques on morphology, residual stress, hardness, and microstructure were studied using Alloy 182 and 52 M specimens treated with water jet peening (WJP), air laser peening (ALP), underwater laser peening (ULP), and ultrasonic nanocrystal surface modification (UNSM). To simulate actual plant conditions, the surfaces of specimens were pre-treated with heavy grinding. Specimens processed a single time and multiple times (× 2, × 4, and × 8) were prepared to evaluate the impact of repeated treatments. The results indicated that all techniques achieved a compressive residual stress field of at least 1 mm depth, as intended. UNSM generated the highest compressive residual stress on the surface, followed by ULP, WJP, and ALP. UNSM also introduced the deepest layer of plastic deformation and grain refinement. ULP initially showed dislocations after a single treatment, while grain refinement occurred after two treatments. WJP and ALP introduced the thinnest layers of plastic deformation, but the smallest grains were observed near the surface. Increasing treatment number deepened plastic deformation but had limited effect on increasing surface residual stress, with only ALP showing a continuous increase. In addition, the mechanism for the differences in the effects of each peening technique on surface characteristics was discussed.

Graphical Abstract

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表面强化对镍基合金182和52m焊缝残余应力和组织的影响

采用水射流强化（WJP）、空气激光强化（ALP）、水下激光强化（ULP）和超声纳米晶表面改性（UNSM）处理合金182和52 M试样，研究了表面强化技术对合金形貌、残余应力、硬度和显微组织的影响。为了模拟实际植物条件，对试样表面进行了重磨预处理。制备单次处理和多次处理的标本（× 2、× 4和× 8），评价重复处理的影响。结果表明，所有技术都达到了至少1mm深度的压缩残余应力场，正如预期的那样。UNSM产生的表面残余压应力最大，其次是ULP、WJP和ALP。UNSM还引入了最深层的塑性变形和晶粒细化。ULP在单一处理后开始出现位错，而在两次处理后出现晶粒细化。WJP和ALP引入了最薄的塑性变形层，但在表面附近观察到最小的晶粒。增加处理次数会加深塑性变形，但对表面残余应力的增加作用有限，只有ALP呈持续增加的趋势。此外，还讨论了各种喷丸工艺对表面特性影响差异的机理。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.