文档介绍：材料科学基础 Fundamental of Materials Lesson thirteen Lesson thirteen 3. Application of Schmid ’ s law ①① How to determine the active . for all the equivalent How to determine the active . for all the equivalent . . ②② Determine the active . by Reflection Rule. Determine the active . by Reflection Rule. ?? Orientation cell for cubic crystals. Orientation cell for cubic crystals. ?? Given: BCC Crystal having {110}<111>slip system. Given: BCC Crystal having {110}<111>slip system. Determine : active slip system in response to tensile Determine : active slip system in response to tensile loading along loading along Solution: a. Draw a orientation cell. b. Label the loading direction in the cell. c. Determine the active . by reflection rule. 4. 4. Determine the active slip systems by Determine the active slip systems by Schmidt's law Schmidt's law ①① Draw a standard projection Draw a standard projection x x= =z z line line x x= =y y line line y y= =z z line line ② Label the loading direction in standard projection. ③③ Mirror rule Mirror rule max max) cos (cos ????? case1. along FCC, orientation triangle : slip system is ]124[]100 ][011 ][111[]101 )[111( case2. case2. along along orientation triangle: orientation triangle: according to the mirror-refraction according to the mirror-refraction rule the active slip system is rule the active slip system is ]215 [] 011 )[111( given [u v w], determine active slip system given [u v w], determine active slip system ]001 [] 111 []101 [?? 5. Determine the active slip systems by Reflection Rule. Example: Example: Given: BCC crystal having {110}<111> slip system Given: BCC crystal having {110}<111> slip system Determine active slip system in response to tensile loading Determine active slip system in response to tensile loading along