Effect of laser speeds on the mechanical property and corrosion resistance of CoCrW alloy fabricated by SLM

Lu, Yanjin; Gan, Yuan; Lin, Jun; Guo, Sai; Wu, Songquan; Lin, Jinxin

doi:10.1108/rpj-07-2015-0085

Cited by 32 publications

(17 citation statements)

References 21 publications

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“…Preliminary investigation on the corrosion characteristics of SLM CoCrW and DLD CoCrMo alloys were reported by Lu, et al, 137 and Mantrala, et al, 138 respectively. Both studies intended to correlate the laser parameters utilized in each manufacturing process with corrosion performance.…”

Section: Titanium Alloysmentioning

confidence: 97%

“…The findings from such studies are summarized in Table 7. [133][134][135][136][137][138][139][140][141][142][143][144][145][146][147][148] In the case of CoCr, Xin, et al, 133 investigated the corrosion characteristics of SLM CoCr in artificial saliva solution-due to the applicability of CoCr-based alloys in odontology-and compared the results with a cast counterpart. The SLM CoCr (i corr = 0.02 μA/cm 2 ) exhibited similar corrosion characteristics to cast (i corr = 0.07 μA/cm 2 ) from potentiodynamic polarization in the analyzed environment.…”

Section: Titanium Alloysmentioning

confidence: 99%

“…Both studies intended to correlate the laser parameters utilized in each manufacturing process with corrosion performance. Lu, et al, 137 found that SLM CoCrW resistance to corrosion was enhanced in 0.9 wt% NaCl when the alloy was produced with laser scan speeds between 700 mm/s and 900 mm/s. The laser scan speed of 700 mm/s showed lowest i corr (7.9 nA/cm 2 ), with a small increase at 900 mm/s (9.8 nA/cm 2 ).…”

Section: Titanium Alloysmentioning

confidence: 99%

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Corrosion of Additively Manufactured Alloys: A Review

et al. 2018

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Additive manufacturing (AM), often termed 3D printing, has recently emerged as a mainstream means of producing metallic components from a variety of metallic alloys. The numerous benefits of AM include net shape manufacturing, efficient use of material, suitability to low volume production runs, and the ability to explore alloy compositions not previously accessible to conventional casting. The process of AM, which is nominally performed using laser (or electron) based local melting, has a definitive role in the resultant alloy microstructure. Herein, the corrosion of alloys prepared by AM using laser and electronbased methods, relating the corrosion performance to the microstructural features influenced by AM processing, are reviewed. Such features include unique porosity, grain structures, dislocation networks, residual stress, solute segregation, and surface roughness. Correlations between reported results and deficiencies in present understanding are highlighted.

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Section: Titanium Alloysmentioning

confidence: 97%

Section: Titanium Alloysmentioning

confidence: 99%

Section: Titanium Alloysmentioning

confidence: 99%

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Corrosion of Additively Manufactured Alloys: A Review

et al. 2018

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“…Other useful studies which varied processing parameters to control residual stresses include those by Tolosa et al [83], Brandl et al [84], Edwards and Ramulu [85], Guan et al [86] Yadroitsev & Smurov [87], Yadroitsev et al [88], Cheng et al [89], Xia et al [90], Lu et al [91], and Yu et al [92]. Tolosa et al, …”

Section: Process Control and Post-processingmentioning

confidence: 99%

Overhanging Features and the SLM/DMLS Residual Stresses Problem: Review and Future Research Need

Patterson¹,

Messimer²,

Farrington³

2017

Preprint

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A useful and increasingly common additive manufacturing (AM) process is the selective laser melting (SLM) or direct metal laser sintering (DMLS) process. SLM/DMLS can produce fulldensity metal parts from difficult materials, but it tends to suffer from severe residual stresses introduced during processing. This limits the usefulness and applicability of the process, particularly in the fabrication of parts with delicate overhanging and protruding features. The purpose of this study was to examine the current insight and progress made toward understanding and eliminating the problem in overhanging and protruding structures. To accomplish this, a survey of literature was undertaken, focusing on process modeling (general, heat transfer, stress and distortion, and material models), direct process control (input and environmental control, hardware-in-the-loop monitoring, parameter optimization, and post-processing), experiment development (methods for evaluation, optical and mechanical process monitoring, imaging, and design-of-experiments), support structure optimization, and overhang feature design; approximately 140 published works were examined. The major findings of this study were that a small minority of the literature on SLM/DMLS deals explicitly with the overhanging stress problem, but some fundamental work has been done on the problem. Implications, needs, and potential future research directions are discussed in-depth in light of the present review.

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“…Other useful studies that varied the processing parameters to control residual stresses include those by Tolosa et al [84], Brandl et al [85], Edwards and Ramulu [86], Guan et al [87] Yadroitsev and Smurov [88], Yadroitsev et al [89], Cheng et al [90], Xia et al [91], Lu et al [92] and Yu et al [93]. …”

Section: Process Input Controlmentioning

confidence: 99%

Overhanging Features and the SLM/DMLS Residual Stresses Problem: Review and Future Research Need

2017

View full text Add to dashboard Cite

Abstract:A useful and increasingly common additive manufacturing (AM) process is the selective laser melting (SLM) or direct metal laser sintering (DMLS) process. SLM/DMLS can produce full-density metal parts from difficult materials, but it tends to suffer from severe residual stresses introduced during processing. This limits the usefulness and applicability of the process, particularly in the fabrication of parts with delicate overhanging and protruding features. The purpose of this study was to examine the current insight and progress made toward understanding and eliminating the problem in overhanging and protruding structures. To accomplish this, a survey of the literature was undertaken, focusing on process modeling (general, heat transfer, stress and distortion and material models), direct process control (input and environmental control, hardware-in-the-loop monitoring, parameter optimization and post-processing), experiment development (methods for evaluation, optical and mechanical process monitoring, imaging and design-of-experiments), support structure optimization and overhang feature design; approximately 143 published works were examined. The major findings of this study were that a small minority of the literature on SLM/DMLS deals explicitly with the overhanging stress problem, but some fundamental work has been done on the problem. Implications, needs and potential future research directions are discussed in-depth in light of the present review.

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Effect of laser speeds on the mechanical property and corrosion resistance of CoCrW alloy fabricated by SLM

Cited by 32 publications

References 21 publications

Corrosion of Additively Manufactured Alloys: A Review

Corrosion of Additively Manufactured Alloys: A Review

Overhanging Features and the SLM/DMLS Residual Stresses Problem: Review and Future Research Need

Overhanging Features and the SLM/DMLS Residual Stresses Problem: Review and Future Research Need

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