TY - JOUR
T1 - Plastic-deformation-driven SiC nanoparticle implantation in an Al surface by laser shock wave
T2 - Mechanical properties, microstructure characteristics, and synergistic strengthening mechanisms
AU - Cui, Chengyun
AU - Cui, Xigui
AU - Li, Xiaodong
AU - Luo, Kaiyu
AU - Lu, Jinzhong
AU - Ren, Xudong
AU - Zhou, Jianzhong
AU - Fang, Cui
AU - Farkouh, Raif
AU - Lu, Yongfeng
N1 - Funding Information:
The authors greatly appreciate the financial support from the National Key R&D Program of China ( 2017YFB1103600 ), National Natural Science Foundation of China (Nos. 51505198 and 51275220 ), Specialized Research Fund for the Doctoral Program of Higher Education (No. 20123227120023 ).
PY - 2018/3
Y1 - 2018/3
N2 - Laser shock-wave-driven nanoparticle implantation (LSWNI) in alloys is a novel surface strengthening technique based on plastic deformation induced by laser shock processing and the excellent properties of hard-phase nanoparticles. In the present work, 50–100 nm silicon carbide (SiC) nanoparticles were successfully implanted into commercially pure aluminum (Al) substrates under the effect of a laser shock wave. After the implantation, stable nanoparticle-reinforced layers were fabricated, and their microstructural response and grain refinement were characterized by X-ray diffraction (XRD), focused ion beam (FIB), and transmission electron microscopy (TEM). In addition, the mechanical properties, including residual stress, nanohardness, elastic modulus, and wear resistance, were investigated. Experimental results showed that Al samples subjected to LSWNI exhibited superior mechanical properties because of the good combination between the gradient microstructure induced by plastic deformation and the gradient distribution of the implanted SiC nanoparticles along the depth direction. Therefore, the overall strengthening effect generated by the LSWNI process can be described as two different modes: (i) the gradient microstructure induced by plastic deformation contributed mainly to the enhancement of residual stress and nanohardness, and (ii) the gradient distribution of the implanted SiC nanoparticles was dedicated primarily to the improvement of the wear resistance. As indicated by the strengthening effect during the LSWNI process, three competing strengthening mechanisms, namely, SiC nanoparticle strengthening, refined grain strengthening, and dislocation strengthening, existed in the gradient-reinforced layers. The detailed contribution of each mechanism to the overall properties of the reinforced layer was determined using the modified Clyne computational model and was described herein. Finally, the wear mechanism of the reinforced layer fabricated by the LSWNI process is revealed.
AB - Laser shock-wave-driven nanoparticle implantation (LSWNI) in alloys is a novel surface strengthening technique based on plastic deformation induced by laser shock processing and the excellent properties of hard-phase nanoparticles. In the present work, 50–100 nm silicon carbide (SiC) nanoparticles were successfully implanted into commercially pure aluminum (Al) substrates under the effect of a laser shock wave. After the implantation, stable nanoparticle-reinforced layers were fabricated, and their microstructural response and grain refinement were characterized by X-ray diffraction (XRD), focused ion beam (FIB), and transmission electron microscopy (TEM). In addition, the mechanical properties, including residual stress, nanohardness, elastic modulus, and wear resistance, were investigated. Experimental results showed that Al samples subjected to LSWNI exhibited superior mechanical properties because of the good combination between the gradient microstructure induced by plastic deformation and the gradient distribution of the implanted SiC nanoparticles along the depth direction. Therefore, the overall strengthening effect generated by the LSWNI process can be described as two different modes: (i) the gradient microstructure induced by plastic deformation contributed mainly to the enhancement of residual stress and nanohardness, and (ii) the gradient distribution of the implanted SiC nanoparticles was dedicated primarily to the improvement of the wear resistance. As indicated by the strengthening effect during the LSWNI process, three competing strengthening mechanisms, namely, SiC nanoparticle strengthening, refined grain strengthening, and dislocation strengthening, existed in the gradient-reinforced layers. The detailed contribution of each mechanism to the overall properties of the reinforced layer was determined using the modified Clyne computational model and was described herein. Finally, the wear mechanism of the reinforced layer fabricated by the LSWNI process is revealed.
KW - Al alloys
KW - Laser shock-wave-driven nanoparticle implantation (LSWNI)
KW - Mechanical properties
KW - Plastic deformation
KW - Strengthening mechanism
UR - http://www.scopus.com/inward/record.url?scp=85040333598&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85040333598&partnerID=8YFLogxK
U2 - 10.1016/j.ijplas.2017.12.004
DO - 10.1016/j.ijplas.2017.12.004
M3 - Article
AN - SCOPUS:85040333598
SN - 0749-6419
VL - 102
SP - 83
EP - 100
JO - International Journal of Plasticity
JF - International Journal of Plasticity
ER -