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| 1 | Role of laser scan strategies in defect control,microstructural evolution and mechanical properties of steel matrix composites prepared by laser additive manufacturing显示文摘Steel matrix composites(SMCs)reinforced with WC particles were fabricated via selective laser melting(SLM)by employing various laser scan strategies.A detailed relationship between the SLM strategies,defect formation,microstructural evolution,and mechanical properties of SMCs was established.The laser scan strategies can be manipulated to deliberately alter the thermal history of SMC during SLM processing.Particularly,the involved thermal cycling,which encompassed multiple layers,strongly affected the processing quality of SMCs.Sshaped scan sequence combined with interlayer offset and orthogonal stagger mode can effectively eliminate the metallurgical defects and retained austenite within the produced SMCs.However,due to large thermal stress,microcracks that were perpendicular to the building direction formed within the SMCs.By employing the checkerboard filling(CBF)hatching mode,the thermal stress arising during SLM can be significantly reduced,thus preventing the evolution of interlayer microcracks.The compressive properties of fabricated SMCs can be tailored at a high compressive strength(~3031.5 MPa)and fracture strain(~24.8%)by adopting the CBF hatching mode combined with the optimized scan sequence and stagger mode.This study demonstrates great feasibility in tuning the mechanical properties of SLM-fabricated SMCs without varying the set energy input,e.g.,laser power and scanning speed. | Hong-yu Chen Dong-dong Gu Qing Ge Xin-yu Shi Hong-mei Zhang Rui Wang Han Zhang Konrad Kosiba | 2021 | International Journal of Minerals,Metallurgy and Materials2021，28，3： | 2 |
| 2 | Discrete event sequencing as a traveling salesman problem显示文摘 | Kosiba E D Wright J R Cobbs A E | 1992 | Computers in Industry1992，19，3： | 1 |
| 3 | Predicting the effect of irradiance and temperature on the flower diameter of greenhouse grown Chrysan- themum显示文摘 | Nothnagl M Kosiba A Larsen R U | 2004 | Sciemia Horticulturae2004，99，34： | 1 |
| 4 | Discrete event sequencing as a traveling salesman problem显示文摘 | KOSIBA E D WRIGHT J R COBBS A E | 1992 | Computers in Industry1992，19，3： | 1 |
| 5 | Hierarchical microstructures and strengthening mechanisms of nano-TiC reinforced CoCrFeMnNi high-entropy alloy composites prepared by laser powder bed fusion显示文摘High entropy alloys(HEAs)have recently received extensive attention due to their appealing mechani-cal performance given their simple phase formation.This study utilized laser powder bed fusion(LPBF)to fabricate high-performance HEA components.By processing respective powder blends,LPBF enabled the fabrication of stronger composites with a uniformly distributed reinforcing phase.Here,the impact of varying content of nano-scale TiC(1-3 wt%)particles for strengthening the CoCrFeMnNi HEA was ex-plored.The microstructural features and mechanical properties of the HEA composites were investigated in detail.The introduction of nano-scale TiC into the HEA matrix encouraged the development of cross-scale hierarchical microstructure and eliminated the formation of oxide inclusions.Incorporating more nano-TiC led to a higher dislocation density and more refined microstructure in the HEA composites,whereas it posed little influence on the anisotropy of the HEA matrix which typically featured a<001>texture along the building direction.With an optimized content of nano-TiC(1-2 wt%),the strength-ductility trade-offcan be overcome by exploiting multiple strengthening mechanisms encompassing grain boundary strengthening,solid solution strengthening,Orowan strengthening,and dislocation strengthen-ing.The HEA composites showed a favored strength-ductility combination with a yield strength of 748-882 MPa,ultimate tensile strength of 931-1081 MPa,and fracture elongation of 23%-29%.This study demonstrates that the introduction of nano-scale TiC is an effective way to simultaneously improve the strength and ductility of additively manufactured HEA materials. | Hongyu Chen Konrad Kosiba Tiwen Lu Ning Yao Yang Liu Yonggang Wang Konda Gokuldoss Prashanth Challapalli Suryanarayana | 2023 | Journal of Materials Science & Technology2023，，5： | 1 |
| 6 | Discrete event sequencing as a traveling salesman problem显示文摘 | Kosiba E D Wright J R Cobbs AE | 1992 | Computersin Industry1992，19，： | 1 |
| 7 | Dyspnea and panic among patients with newly diagnosed non-small cell lung cancer显示文摘 | Shin JA Kosiba JD Traeger L | 2014 | J Pain Symptom Manage2014，48，3： | 1 |
| 8 | Discrete event sequence as a traveling salesman problem 显示文摘 | KOSIBA E D WRIGHT J R | 1992 | Computers in Industry1992，19，2： | 1 |
| 9 | Discrete event sequencing as a traveling salesman problem显示文摘 | Kosiba E D Wright J R Cobbs A E | 1992 | Computers in Industry1992，19，5： | 1 |
| 10 | Discrete event sequencing as a traveling salesman problem显示文摘 | Kosiba E D Wright J R Cobbs A E | 1992 | Computers in Industry1992，19，： | 1 |
| 11 | Discrete event sequence as a traveling salesman problem显示文摘 | Kosiba E D Wright J R | 1992 | Computers in Industry1992，19，2： | 1 |
| 12 | Analysis of rhythmic growth in holly (llexXmeserveae) grown in controlled conditions显示文摘 | Kosiba A Nothnagl M Alsanius B W | 2005 | Scientia Horticulturae2005，104，： | 1 |
| 13 | Discrete event sequence aa a traveling salesman problem显示文摘 | KOSIBA E D WRIGHT J R | 1992 | Computers in Industry1992，19，2： | 1 |
| 14 | The involvement of norepinephrine,neuropeptide Y,and nitric oxide in the cutaneous vasodilator response to local heating in humans显示文摘 | Hodges G J Kosiba W A Zhao K | 2008 | J Appl Physiol(1985)2008，105，1： | 1 |
| 15 | Discrete Event Sequencing as a Traveling Salesman Problem显示文摘 | Kosiba E D Wright J R Cobbs A E | 1992 | Computers in Industry (S0166-3615)1992，19，： | 1 |
| 16 | An automatic jigsaw puzzle solver显示文摘 | Kosiba D A Devaux P M Balasubramanian S | 1994 | Pattern Recognition1994，1，： | 1 |
| 17 | 显示文摘 | Ecke G Kosiba R | 2002 | Nucl Instr and Meth B2002，196，： | 1 |
| 18 | Discrete event sequencing as a traveling salesman problem显示文摘 | Kosiba E D Wright R | 1992 | Computers in Industry1992，19，2： | 1 |
| 19 | Discrete event sequencing as a traveling salesman problem显示文摘 | Kosiba E D Wright J R Cobbs A E | 1992 | Computers in Industry1992，19，3： | 1 |
| 20 | 显示文摘 | Ecke G Kosiba R | 2002 | Nucl Instr and Meth2002，187，： | 1 |
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