Mr. Xianyou Chen Profile

Xianyou Chen

at Ningbo Institute of Materials Technology and Engineering

SPIE Involvement:

Author

Publications (3)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 16 December 2022 Paper

Surface features of multi-beam coupling nanosecond laser processing of nickel-based superalloys

Chengnuo Yi, Xiaoxiao Chen, Xianyou Chen, Tao Chen, Wenwu Zhang

Proceedings Volume 12501, 1250109 (2022) https://doi.org/10.1117/12.2648664

KEYWORDS: Polishing, Surface finishing, Laser processing, Surface roughness, Laser energy, Confocal microscopy

Read Abstract +

Nickel-based superalloy (DZ411) is widely used in the manufacture of high-temperature components in the aerospace field due to its excellent physical and mechanical properties, such as high-temperature resistance, oxidation resistance, and corrosion resistance. Laser polishing can improve the surface quality and service performance of nickel-based superalloy materials. In this paper, a new type of multi-beam coupling laser based conventional laser is used to process the nickelbased superalloy materials. The processing experiments of nickel-based superalloy were carried out by changing laser power, scanning speed, and scanning pitch. Then the polished surfaces were observed and detected by laser confocal microscope. The results show that the surface of nickel-based superalloy materials has certain regularity with the variations of process parameters. Under these experimental parameters, surface roughness (Ra) decreases first and then increases with the increase of laser power, scanning speed, and scanning pitch. The minimum Ra of the polished surface is 1.06 μm under the process parameter combinations of laser power of 1W, scanning speed of 400 mm/s, and scanning pitch of 20 μm. The maximum valley depth (Rv) and the maximum height (Rz) of profile first decrease and then increase with the increase of laser power or scanning speed. However, Rv and Rz had a little rate of fluctuation with the increase of scanning pitch. The laser polishing process involves the dynamic time-varying absorption mechanism of the coupled laser energy by polymorphic materials, and it is accompanied by complex physical processes such as material melting, gasification, and re-condensation. When Ra is relatively low, a clear corrugated structure appears on the machined surface. This research work can provide process data support for optimizing the polishing process parameters of nickel-based superalloys and expand the laser processing types.

Proceedings Article | 16 December 2022 Paper

Microgroove machining characteristics of Si3N4 ceramics by dual-beam coupled nanosecond laser

Xuanhua Zhang, Xiaoxiao Chen, Xianyou Chen, Wenwu Zhang, Lirong Huang

Proceedings Volume 12501, 1250108 (2022) https://doi.org/10.1117/12.2648603

KEYWORDS: Ceramics, Surface roughness, Laser processing, Laser energy, Semiconductor lasers, Pulsed laser operation, Microscopes, Laser scanners, Micromachining

Read Abstract +

Due to the characteristics of high hardness, wear resistance, corrosion resistance, excellent thermal shock resistance, and low thermal expansion coefficient, Si₃N₄ ceramics are widely used in aerospace, national defense, electronic and electrical, mechanical, chemical, and other fields. In this paper, the grooving experiments of Si₃N₄ ceramics were carried out by using a novel dual-beam coupled nanosecond pulse laser, and the influence of laser power and scanning speed on the surface morphology and geometric size of grooves were studied. The results show that the laser power has a significant effect on the surface morphology and geometric size of grooves. With the increase of laser power, the laser power density augments, and the width and depth of grooves increase. The groove width and groove depth first increase and then decrease with the increase of scanning speed, and both the groove width and depth reach the maximum value at scanning speed of 800 mm/min.

Proceedings Article | 31 August 2021 Paper

Research on polishing process of aluminum alloy curved surface by nanosecond laser beam coupling

Xianyou Chen, Xiaoxiao Chen, Yuan Li, Wenwu Zhang, Xingrong Shen

Proceedings Volume 11907, 1190720 (2021) https://doi.org/10.1117/12.2603072

Read Abstract +

The coupled nanosecond laser processing system was used for processing 6061 aluminum alloy in this paper. At first, we explored the relationship between laser processing parameters, such as laser power, laser repetition frequency, as well as scanning speed, and the processed surface quality for 6061 aluminum alloy plate sample. The optimal laser parameters were determined by the experiment of the flat plate sample processing, and then the paths of laser processing were designed and planned on the aluminum alloy with curved surface to explore the influence of curvature on the surface quality. The results show that the new processing technology of coupled nanosecond laser polishing could obtain good surface quality. The optimal laser processing parameters are average laser power of 5W, scanning speed of 500mm/min, and repetition frequency of 10kHz, which could reduce the surface roughness by 43%. In addition, the surface quality of the aluminum alloy is closer to the original surface as the curvature increased. And the convex surface has a lower surface roughness than the concave surface because the spot shape is different at different curvature positions. The coupled laser polishing process provides theoretical and technological support for the high-quality machining of 6061 aluminum alloy in this study.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years