An indentation simulation of the crystal Ni is carried out by a molecular dynamics technique （MD） to study the mechanical behavior at nanometer scales. Indenter tips with both sphere shape and conical shape with 60&...An indentation simulation of the crystal Ni is carried out by a molecular dynamics technique （MD） to study the mechanical behavior at nanometer scales. Indenter tips with both sphere shape and conical shape with 60° cone angle are used, and simulation samples with different crystal orientations are adopted. Some defects such as dislocations and point defects are observed. It is found that nucleated defects （dislocations, amorphous atoms） are from the local region near the pin tip or the sample surface. The temperature distribution of the local region is analyzed and it can explain our MD simulation results.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10872197, 10372107, 10721202 and 50890171, Chinese Academy of Sciences under Grant Nos KJCX2-YW-M04 and KFJJ08-10 and the National Basic Research Program of China under Grant No 2010CB631004.
文摘An indentation simulation of the crystal Ni is carried out by a molecular dynamics technique （MD） to study the mechanical behavior at nanometer scales. Indenter tips with both sphere shape and conical shape with 60° cone angle are used, and simulation samples with different crystal orientations are adopted. Some defects such as dislocations and point defects are observed. It is found that nucleated defects （dislocations, amorphous atoms） are from the local region near the pin tip or the sample surface. The temperature distribution of the local region is analyzed and it can explain our MD simulation results.
