Microstructure and Wear Property of ZrO2-Added NiCrAlY Prepared by Ultrasonic-Assisted Direct Laser Deposition

For improving the wear properties of NiCrAlY, the 10 wt %, 20 wt % and 30 wt % ZrO2-added NiCrAlY samples were prepared by ultrasonic-assisted direct laser deposition, respectively. The results showed that the ultrasonic-assisted direct laser deposition can realize the ZrO2-added NiCrAlY preparation. Furthermore, due to the cavitation effect and agitation of the ultrasound in the molten pool, ultrasonic-assisted could make the upper surface of the samples smoother and flatter, and it also improved the microstructural homogeneity. The microstructure was mainly composed of columnar dendrites, and most of ZrO2 particles were located in the intergranular regions. The principal phase constituents were found to contain γ-Ni and t-NiZr2, and the amorphous (Ni, Zr) intermetallic phase generated, because of more rapid solidification after ultrasound assisted. The microhardness was improved slightly with the increase of ZrO2 contents, rising from 407.9 HV (10% ZrO2) to 420.4 HV (30% ZrO2). Correspondingly, wear mass loss was decreased with the maximum drop 22.7% of 30% ZrO2 compared to that of 10% ZrO2, and wear mechanisms were mainly abrasive wear with slightly adhesive wear. After applying ultrasound, the oxide islands in samples disappeared, and more ceramic particles were retained. Thus, the hardness and wear performance of the samples were improved.

Download Full-text

Real-time spectrographic analysis of the melt pool during direct laser deposition process

10.2351/1.5061265 ◽

2008 ◽

Author(s):

Konrad Bartkowiak

Keyword(s):

Real Time ◽

Deposition Process ◽

Laser Deposition ◽

Spectrographic Analysis ◽

Direct Laser Deposition ◽

Melt Pool ◽

Direct Laser

Download Full-text

Microstructure and properties of Ni-Co-Mn-Al magnetic shape memory alloy prepared by direct laser deposition and heat treatment

Optics & Laser Technology ◽

10.1016/j.optlastec.2021.107119 ◽

2021 ◽

Vol 141 ◽

pp. 107119

Author(s):

Wuming Jia ◽

Suiyuan Chen ◽

Luting Wang ◽

Fanmin Shang ◽

Xinru Sun ◽

...

Keyword(s):

Heat Treatment ◽

Shape Memory Alloy ◽

Shape Memory ◽

Laser Deposition ◽

Magnetic Shape Memory ◽

Direct Laser Deposition ◽

Microstructure And Properties ◽

Magnetic Shape Memory Alloy ◽

Direct Laser

Download Full-text

A high strength low alloy steel fabricated by direct laser deposition

Vacuum ◽

10.1016/j.vacuum.2018.12.030 ◽

2019 ◽

Vol 161 ◽

pp. 225-231 ◽

Cited By ~ 15

Author(s):

Qiang Wang ◽

Song Zhang ◽

Chunhua Zhang ◽

Jianqiang Wang ◽

M. Babar Shahzad ◽

...

Keyword(s):

Alloy Steel ◽

High Strength ◽

Laser Deposition ◽

Low Alloy Steel ◽

Direct Laser Deposition ◽

Direct Laser

Download Full-text

Effect of laser incident energy on microstructures and mechanical properties of 12CrNi2Y alloy steel by direct laser deposition

Journal of Material Science and Technology ◽

10.1016/j.jmst.2018.10.024 ◽

2019 ◽

Vol 35 (2) ◽

pp. 395-402 ◽

Cited By ~ 20

Author(s):

Tingting Guan ◽

Suiyuan Chen ◽

Xueting Chen ◽

Jing Liang ◽

Changsheng Liu ◽

...

Keyword(s):

Mechanical Properties ◽

Alloy Steel ◽

Incident Energy ◽

Laser Deposition ◽

Direct Laser Deposition ◽

Direct Laser ◽

Microstructures And Mechanical Properties

Download Full-text

Self-Sufficient Modeling of Single Track Deposition of Ti–6Al–4V With the Prediction of Capture Efficiency

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4041423 ◽

2018 ◽

Vol 141 (1) ◽

Cited By ~ 14

Author(s):

Christopher Katinas ◽

Shunyu Liu ◽

Yung C. Shin

Keyword(s):

Molten Pool ◽

Deposition Process ◽

Capture Efficiency ◽

Laser Deposition ◽

Single Track ◽

Profile Error ◽

Track Geometry ◽

Direct Laser Deposition ◽

Direct Laser ◽

Traditional Manufacturing

Understanding the capture efficiency of powder during direct laser deposition (DLD) is critical when determining the overall manufacturing costs of additive manufacturing (AM) for comparison to traditional manufacturing methods. By developing a tool to predict the capture efficiency of a particular deposition process, parameter optimization can be achieved without the need to perform a costly and extensive experimental study. The focus of this work is to model the deposition process and acquire the final track geometry and temperature field of a single track deposition of Ti–6Al–4V powder on a Ti–6Al–4V substrate for a four-nozzle powder delivery system during direct laser deposition with a LENS™ system without the need for capture efficiency assumptions by using physical powder flow and laser irradiation profiles to predict capture efficiency. The model was able to predict the track height and width within 2 μm and 31 μm, respectively, or 3.3% error from experimentation. A maximum of 36 μm profile error was observed in the molten pool, and corresponds to errors of 11% and 4% in molten pool depth and width, respectively. Based on experimentation, the capture efficiency of a single track deposition of Ti–6Al–4V was found to be 12.0%, while that from simulation was calculated to be 11.7%, a 2.5% deviation.

Download Full-text

Determining the Optimal Mode of the Inconel 718 Alloy Deposition at a Direct Laser Deposition Plant

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1037.3 ◽

2021 ◽

Vol 1037 ◽

pp. 3-12

Author(s):

Maxim Oleynik ◽

Alexander I. Khaimovich ◽

Andrey V. Balaykin

Keyword(s):

Tensile Strength ◽

Energy Density ◽

Target Function ◽

Laser Deposition ◽

Steep Ascent ◽

Inconel 718 Alloy ◽

Direct Laser Deposition ◽

Direct Laser ◽

Optimal Mode ◽

Deposition Mode

The paper describes determining the optimal direct laser deposition mode when processing the results of a two-factor experiment by the steep ascent method. The dependence of the ultimate tensile strength on the volumetric energy density and the lateral pitch was chosen as the target function.

Download Full-text