CAJ | 학술논문

根据脉冲放电对含圆柱形非金属夹杂构件所引起的温度场，将其分解为轴对称温度场和非轴对称温度场两部分，采用热弹性位移势及叠加原理，在给定的边界条件下，分别求解两类温度场所引起的热应力场。以16M n构件强化为例求解夹杂边界处热应力分布发现，在该区域，无论径向、周向应力均为压应力，而且远超出材料的屈服强度；在温度和应力耦合作用下，将极大影响夹杂附近的组织性能及应力状态。进一步研究沿径向路径的热应力变化发现，脉冲放电引起的热应力仅对含夹杂区域的组织性能及应力状态影响较大，而对无夹杂区域并没有太大影响，因此，该技术可应用于在线构件的强化。
근거맥충방전대함원주형비금속협잡구건소인기적온도장，장기분해위축대칭온도장화비축대칭온도장량부분，채용열탄성위이세급첩가원리，재급정적변계조건하，분별구해량류온도장소인기적열응력장。이16M n구건강화위례구해협잡변계처열응력분포발현，재해구역，무론경향、주향응력균위압응력，이차원초출재료적굴복강도；재온도화응력우합작용하，장겁대영향협잡부근적조직성능급응력상태。진일보연구연경향로경적열응력변화발현，맥충방전인기적열응력부대함협잡구역적조직성능급응력상태영향교대，이대무협잡구역병몰유태대영향，인차，해기술가응용우재선구건적강화。
According to the temperature of pulse discharge in metal components with cylindrical non‐metallic inclusion ,the tem‐perature field can be decomposed into the axial symmetry temperature field and asymmetric temperature field .The stress field is solved through potential of the thermal displacement and superposition principle under the boundary condition of assignment .And taking 16Mn components as example ,it is discovered that both radial and circumferential stresses around the inclusion are com‐pressive stress which far exceeds the yield strength .Therefore under the coupling effect of temperature and stress ,the micro‐structure and properties nearby the inclusion will be affected significantly .Furthermore ,the Mises stress is more significant near‐by the inclusion than anywhere by discussing the thermal stress along the radial direction .Therefore ,this technology has less effects on the region without inclusion and can be used on online strengthening .