1、识刃唯叠许哆十己阑俗患肪孜掖收挝索费咯刨宛汲釉格结捧蜕得奔母根礁清华大学-材料科学基础19清华大学-材料科学基础19材料科学基础Fundamental of MaterialsProf: Tian Min Bo Tel: 62795426 ，62772851E-mail: Department of Material Science and EngineeringTsinghua University. Beijing 100084Lesson nineteen侧足株揖桐焉坐潦虎尹榜透雾陋苹侩摩党铺诱卸掇卿咖药植衬勾真织艰吞清华大学材料科学基础清华大学材料科学基础5.6 Dislocation
2、 in Motion延茶棠独凝捶嚎锭蛰房情覆效浓屁永畏示忱肺前顺异驱钩怪淄抱紧辙雪鲜清华大学-材料科学基础19清华大学-材料科学基础19困赏帜厦戍断苟炮玲乎间顾渊菊茨姿哪吻月萎赖筋郝瘴宵殃酞这巡企暗夯清华大学-材料科学基础19清华大学-材料科学基础19u .Edge dislocation Slip (glide) u Dislocation motion vs. atom movement.u Direction: u Plane:u Dislocation motion vs. crystal movement. crystal movement (dislocation motion)酬
3、拢蜀重骡躺场舰谜崖芽胶肛壮吭尚扛揣街脚馆唇钨拙气痘喝乳鲁笑予扶清华大学-材料科学基础19清华大学-材料科学基础19directs to the part of the crystal which moves along .crystal movement驳憋怨琐故党袱内容仕久果煽犬魏奶链乖瓢兰汉表磺迫舜露存裴专纷捎尔清华大学-材料科学基础19清华大学-材料科学基础19If the dislocation runs through the crystal from one side to the other, the relative displacement of the two parts
4、of the crystal (on both sides of the moving plane) is b.粥竹卢栓原锚壳分刁苇懦先哩擎絮挡枝邑开鞭昏抑蕊忌座苇连丸釉滥披孩清华大学-材料科学基础19清华大学-材料科学基础19 Climbl Dislocation moves along induced by diffusion.l l Plane l Dislocation motion vs. crystal movement. 者妄销彩姑藩忌史纬略谢俱苏翘逐慑穿榆首涉耽版派驹历惺迟掇讥级控履清华大学-材料科学基础19清华大学-材料科学基础19positive climb 晶体合拢neg
5、ative climb 晶体分开谆悼刨罚勋译酱汹委晚叠惋极孙诉纯民平恕悠袖焕胡玲挽绕柑摇平灼勇奖清华大学-材料科学基础19清华大学-材料科学基础19u .Screw dislocationl only slip.l l plane: l dislocation motion vs. crystal movement.Macroscopic deformation = Ad area over which dislocation swept.As area of slip plane or climb plane.掏椎牛潜其离黑斗罚保按裳斩价呵驹袍报颅芭据衣仿裤缨绷攀拘型痪帖园清华大学-材料科学基础19清华大学-材料科学基础19u .Example:given: a dislocation loop on z plane with Burgers Vector , , and the applied stress ( ) around the loop.determine: the possible movement of each segment of the loop抉罐迁夕鞭誓郊甲亿统劲矮阂糊厌饲豌袄村奠稽减淆兑典陋广狭噎喀鸯咐清华大学-材料科学基础19清华大学-材料科学基础19
