© 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 AISI P:20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 材料科学与工程学院 11 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 损伤层 11 退火工业纯钛的切割损伤 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
③ 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 材料科学与工程学院 12 School of Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 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。 12 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
图 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 SIMPLIOOO ● LU三-L三 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/). 13 School ot Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 制样-镶嵌 13
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/). 14 School or Materials Science and Engineering
材料科学与工程学院 School of Materials Science and Engineering 制样-镶嵌 14