损伤层 ·切割是为了取样并使样品留下的残余损伤 最小 recast layer thickness =45 um 切割面 AISP20钢电火花切割表面重熔层 夹钳造成的变形孪晶 退火工业纯钛的切割损伤 11
损伤层 退火工业纯钛的切割损伤 11 AISI P20钢电火花切割表面重熔层 • 切割是为了取样并使样品留下的残余损伤 最小
取样 制样 浸蚀 观察 12
12 取样 制样 浸蚀 观察
制样 ·目的：去除损伤层，得到表面光滑平整的 磨面，是显示材料真实组织的前提。 镶嵌 磨光 抛光 (mounting) (grinding) (polishing) 热镶 粗磨 ·机械抛光 冷镶 ·细磨 电解抛光 夹持 13
制样 • 目的：去除损伤层，得到表面光滑平整的 磨面，是显示材料真实组织的前提。 13 镶嵌 (mounting) • 热镶 • 冷镶 • 夹持 磨光 (grinding) • 粗磨 • 细磨 抛光 (polishing) • 机械抛光 • 电解抛光
制样-镶嵌 Required when(1)the sample is small or too oddly shaped to be handled.(2)The sample edge area needs to be examined Thermal Mounting: The sample is encased in thermosetting or thermoplastic polymers at high temperature and pressure SIMPLROOO LU三-L三y Adapted from MECH 4430 Lecture notes by Dr.Jingshen Wu and Dr.Yang Leng,Department of Mechanical Engineering,Hong Kong University of Science and Technology (http://www.me.ust.hk/-mejswu/). 14
制样-镶嵌 14
制样-镶嵌 Cold Mounting: The sample is encased in epoxy type materials.Type of epoxy depends upon material being analyzed. Adapted from MECH 4430 Lecture notes by Dr.Jingshen Wu and Dr.Yang Leng,Department of Mechanical Engineering,Hong Kong University of Science and Technology (http://www.me.ust.hk/-mejswu/) 15
制样-镶嵌 15