功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2015年
1期
1046-1050
,共5页
贾春楠%肖革胜%袁国政%李志刚%树学峰
賈春楠%肖革勝%袁國政%李誌剛%樹學峰
가춘남%초혁성%원국정%리지강%수학봉
无铅焊料%应变率敏感性%纳米压入%力学性能
無鉛銲料%應變率敏感性%納米壓入%力學性能
무연한료%응변솔민감성%납미압입%역학성능
lead-free solders%strain rate sensitivity%nanoindentation%mechanical properties
采用纳米压入法对 Sn-3.0Ag-0.5Cu、Sn-0.7 Cu及Sn-3.5 Ag无铅焊料的室温应变率敏感性进行研究.相同压深下,压入载荷随着加载应变率的提高而增大;3种焊料的接触刚度均随压深近似线性增加,不同应变率下弹性模量基本不变;硬度随着应变率的增加而增大,表明了无铅焊料的塑性应变率强化性.保载阶段蠕变位移随加载段应变率的增加而增大,蠕变应变率先急剧下降然后趋于稳定.通过系统研究应变率对3种常用无铅焊料力学性能的影响,为评价无铅焊点的服役可靠性提供参考.
採用納米壓入法對 Sn-3.0Ag-0.5Cu、Sn-0.7 Cu及Sn-3.5 Ag無鉛銲料的室溫應變率敏感性進行研究.相同壓深下,壓入載荷隨著加載應變率的提高而增大;3種銲料的接觸剛度均隨壓深近似線性增加,不同應變率下彈性模量基本不變;硬度隨著應變率的增加而增大,錶明瞭無鉛銲料的塑性應變率彊化性.保載階段蠕變位移隨加載段應變率的增加而增大,蠕變應變率先急劇下降然後趨于穩定.通過繫統研究應變率對3種常用無鉛銲料力學性能的影響,為評價無鉛銲點的服役可靠性提供參攷.
채용납미압입법대 Sn-3.0Ag-0.5Cu、Sn-0.7 Cu급Sn-3.5 Ag무연한료적실온응변솔민감성진행연구.상동압심하,압입재하수착가재응변솔적제고이증대;3충한료적접촉강도균수압심근사선성증가,불동응변솔하탄성모량기본불변;경도수착응변솔적증가이증대,표명료무연한료적소성응변솔강화성.보재계단연변위이수가재단응변솔적증가이증대,연변응변솔선급극하강연후추우은정.통과계통연구응변솔대3충상용무연한료역학성능적영향,위평개무연한점적복역가고성제공삼고.
Nanoindentation tests were conducted on lead-free solders of Sn-3.0Ag-0.5Cu,Sn-0.7Cu and Sn-3.5Ag to investigate the strain rate sensitivity at room temperature.For the lead-free solders,indentation load under the same indentation depth increases with increasing loading strain rate.The contact stiffness during loading in-creases with indentation depth approximatively linearly,and the elastic modulus of the lead-free solders under different strain rates basically remains unchanged.The hardness increases as strain rate increases,indicating the strain rate hardening effect of viscous solders.During the holding stage,creep displacement increases with in-creasing strain rate during loading,while the creep strain rate firstly declines sharply and then stabilizes.Effects of stain rate on the mechanical properties of lead-free solders was systematically studied,providing valuable in-formation for the reliability evaluation of lead-free solder j oints in the service process.