Simultaneously improving mechanical properties and corrosion resistance of as-cast AZ91 Mg alloy by ultrasonic surface rolling

Han, Jing; Wang, Cong; Song, Yuanming; Liu, Zhiyuan; Sun, Jiapeng; Zhao, Jun

doi:10.1007/s12613-021-2294-2

Cited by 20 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface ultrasonic rolling strengthening process can be utilized to improve the surface performance of materials and increase their strength, contributing also towards environmental protection, areas which have been of wide concern. Many researchers have used this technology to strengthen the surface properties of steel, aluminum alloy, titanium alloy and other materials [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Rolling on Surface Properties of GCr15 Spherical Joint Bearing

Zhang,

Yang,

et al. 2024

Lubricants

View full text Add to dashboard Cite

Ultrasonic surface rolling process (USRP) has the potential to improve the surface mechanical properties of metal components with platelike or cylindrical macrostructure, but its effect on spherical surfaces remains to be studied in depth. In order to investigate the effect of USRP on the surface roughness, hardness and wear resistance of a spherical joint bearing made of GCr15 bearing steel, ultrasonic rolling strengthening was carried out on a spherical bearing surface under various conditions. The surface roughness and hardness variations of samples before and after strengthening were investigated. It was found that the USRP strengthening process can effectively enhance the surface properties of GCr15 spherical bearing materials, reduce the surface roughness by more than 45%, and increase the surface hardness by more than 10%. Friction and wear tests were carried out before and after ultrasonic rolling. The results show that the friction coefficient of the bearing surface can be reduced by 28%, and that the wear volume can be reduced by 29%. The variation in the friction coefficient correlated to the variance of wear volume as the reinforcement changes.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Rolling on Surface Properties of GCr15 Spherical Joint Bearing

Zhang,

Yang,

et al. 2024

Lubricants

View full text Add to dashboard Cite

show abstract

“…Constructing gradient nanostructures (GNSs) have been proven to be a good strategy for enhancing the mechanical properties of metals and alloys inspired by nature [1,2]. Over the past two decades, this strategy has been successfully applied in almost all types of structural metallic materials [3][4][5][6][7], such as Cu and Cu alloys [8,9], Mg alloys [10,11], and Ti alloys [12,13]. Several methods have been developed to prepare the gradient nanostructure, such as surface mechanical grinding treatment (SMGT) [3], surface mechanical attrition treatment (SMAT) [14], surface mechanical rolling treatment (SMRT) [15], laser shock peening (LSP) [16], ultrasonic surface rolling (USR), or ultrasonic nanocrystalline surface modification (UNSM) [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling

Meng

Feng

et al. 2023

Scanning

Self Cite

View full text Add to dashboard Cite

In this work, ultrasonic severe surface rolling (USSR), a new surface nanocrystallization technique, is used to prepare gradient nanostructure (GNS) on the commercial Q345 structural steel. The microstructure of the GNS surface layer is characterized by employing EBSD and TEM, and the result indicates that a nanoscale substructure is formed at the topmost surface layer. The substructures are composed of subgrains and dislocation cells and have an average size of 309.4 nm. The GNS surface layer after USSR processing for one pass has a thickness of approximately 300 μm. The uniaxial tensile measurement indicates that the yield strength of the USSR sample improves by 25.1% compared to the as-received sample with slightly decreased ductility. The nanoscale substructure, refined grains, high density of dislocations, and hetero-deformation-induced strengthening are identified as responsible for the enhanced strength. This study provides a feasible approach to improving the mechanical properties of structural steel for wide applications.

show abstract

“…This dilemma is also outstanding for Cu and its alloys, and thus extraordinary efforts have been devoted to strengthening Cu alloys with less sacrificing ductility [ 4 , 5 , 6 , 7 ]. Architecting gradient structure (GS) is a success story to overcome this dilemma for various alloys [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ] and has been successfully applied in pure Cu and several Cu alloys [ 15 , 16 , 17 , 18 , 19 ]. Lu et al prepared a gradient nano-grained pure Cu using a surface mechanical grinding treatment (SMGT) [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Preparing Thick Gradient Surface Layer in Cu-Zn Alloy via Ultrasonic Severe Surface Rolling for Strength-Ductility Balance

Sun

et al. 2022

Materials

Self Cite

View full text Add to dashboard Cite

A gradient structure (GS) design is a prominent strategy for strength-ductility balance in metallic materials, including Cu alloys. However, producing a thick GS surface layer without surface damage is still a challenging task limited by the available processing technology. In this work, a gradient structure (GS) surface layer with a thickness at the millimeter scale is produced in the Cu-38 wt.% Zn alloy using ultrasonic severe surface rolling technology at room temperature. The GS surface layer is as thick as 1.1 mm and involves the gradient distribution of grain size and dislocation density. The grain size is refined to 153.5 nm in the topmost surface layer and gradually increases with increasing depth. Tensile tests indicate that the single-sided USSR processed alloy exhibits balanced strength (467.5 MPa in yield strength) and ductility (10.7% in uniform elongation). Tailoring the volume fraction of the GS surface layer can tune the combination of strength and ductility in a certain range. The high strength of GS surface layer mainly stems from the high density of grain boundaries, dislocations and dislocation structures, deformation twins, and GS-induced synergistic strengthening effect. Our study elucidates the effect of the thick GS surface layer on strength and ductility, and provides a novel pathway for optimizing the strength-ductility combination of Cu alloys.

show abstract

Simultaneously improving mechanical properties and corrosion resistance of as-cast AZ91 Mg alloy by ultrasonic surface rolling

Cited by 20 publications

References 37 publications

Effect of Ultrasonic Rolling on Surface Properties of GCr15 Spherical Joint Bearing

Effect of Ultrasonic Rolling on Surface Properties of GCr15 Spherical Joint Bearing

Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling

Preparing Thick Gradient Surface Layer in Cu-Zn Alloy via Ultrasonic Severe Surface Rolling for Strength-Ductility Balance

Contact Info

Product

Resources

About