no artifacts Specimen preparation for metallography
Specimen preparation for metallography 1 no artifacts
A good specimen is half the battle. 2
A good specimen is half the battle. 2
Metallography（金相学) ·Metallography: -A systematic method to examine microstructure of materials(mainly metallic materials) Can also be used to examine ceramics, polymers and semiconductors 3
Metallography (金相学 ) • Metallography: – A systematic method to examine microstructure of materials (mainly metallic materials) – Can also be used to examine ceramics, polymers and semiconductors 3
Robert Hooke(1635-1703) 于17世纪晚期设计的显微镜 图1铁阴石腐刻后直接印制的魏氏组织(1820) Count Alois von Beckh Widmanstatten Π.几.AHOCOB H.C.Sorby A.Martens F.Osmond Fig:5
4 Count Alois von Beckh Widmanstätten П.П. Аносов H.C. Sorby A. Martens F. Osmond Robert Hooke(1635-1703) 于17世纪晚期设计的显微镜
Sectioning 取样 Preparation 制样 How to minimize and remove the damaged layer during sectioning,grinding Etching 浸 and polishing. 蚀 Observation 观察 5
5 Sectioning 取样 Preparation 制样 Etching 浸 蚀 Observation 观察 How to minimize and remove the damaged layer during sectioning, grinding and polishing
Where to section the specimen 礼制表新 轧剂方阿 奢 …2 3 3 图1~1轧制型材金相试样的切取 1一与轧制彩预Y行的纵断面2一与轧制表面垂直的纵断面 3一横断面4一放射纵断啊6一切向纵断面 6
Where to section the specimen 6
Sectioning DK770线 Abrasive cutting Electric discharge machining(EDM,电 火花放电加工) 图104数控线切新加工原理 可4可55g司 1一数控装量：2一浓找简！3一界轮：4一电假丝：5一工件： 6一喷嘴：7一绝壕板：8一高频林冲发生露：9一系1 10一工作液：11一步速电机 7
7 Sectioning Abrasive cutting Electric discharge machining (EDM, 电 火花放电加工 )
Sectioning (a) Microtomy: · Useful for preparing soft materials such as polymer samples. Steel,glass or diamond knives in a microtome can Specimen Specimen holder block Block Specimen cut samples into very thin Knife sections. Knife Cut section Sections (b) 。@d (a)Adapted from http://www.me.ust.hk/-meiswu/. Copper Microscope slide (b)From http://blass.com.au/definitions/microtome mesh grid 8
Sectioning 8
Damaged layer 退火工业纯钛的切割损伤 recast layer thickness=45 um 切割面 AISI P20钢电火花切割表面重熔层 夹钳造成的变形孪晶 9
Damaged layer 9 退火工业纯钛的切割损伤 AISI P20钢电火花切割表面重熔层
Sectioning 取样 Preparation 制样 How to minimize and remove the damage layer during sectioning,grinding Etching 浸 and polishing. 蚀 Observation 观察 10
10 Sectioning 取样 Preparation 制样 Etching 浸 蚀 Observation 观察 How to minimize and remove the damage layer during sectioning, grinding and polishing