Deformation and Fracture of Materials

Course Information

College	Toyama College	Year	2019
Course Title	Deformation and Fracture of Materials
Course Code	0207	Course Category	Specialized / Elective
Class Format	Lecture	Credits	Academic Credit: 1
Department	Department of Mechanical Engineering	Student Grade	5th
Term	Second Semester	Classes per Week	後期:2
Textbook and/or Teaching Materials	Nothing
Instructor	Okane Masaki

Course Objectives

In this course, students will aim to understand the theory of dislocation, which microscopically discusses the plastic deformation behavior of materials from the viewpoint of mechanical and material aspects. In addition, students will discuss various metallic material strengthening mechanisms and plastic working on the basis of the dislocation theory. Specifically, the contents stated in "Standard Level of Achievement" in the Rubric are the basic goals of this course.

Rubric

	Ideal Level of Achievement	Standard Level of Achievement	Unacceptable Level of Achievement)
Slip plane, slip direction, slip system	Students understand the slip plane, slip direction, slip system in fcc, bcc, hcp and can correctly explain.	Students can explain the slip plane, slip direction, slip system in fcc, bcc and hcp.	Students can not explain the slip plane, slip direction, slip system in fcc, bcc, hcp.
Schmidt factor	Students understand the Schmidt factor and can correctly calculate the shear stress acting on any crystal plane.	Students understand the Schmidt factor and can determine the shear stress acting on the typical crystal plane.	Students do not understand the Schmidt factor and can not calculate the shear stress acting on a specific crystal plane.
Edge dislocation, screw dislocation, mixed dislocation, Burgers vector	Students understand the atomic arrangement in edge dislocations and screw dislocations and can correctly explain the correlation between dislocation lines and the Burgers vector and the direction of dislocation movement.	Students can imagine the atomic arrangements in edge dislocations and screw dislocations and also explain the Burgers vector.	Students can not image the atomic arrangement in edge dislocations or screw dislocations.
Force acting on dislocation, Forces working between dislocations	Students can correctly calculate the forces acting on dislocations and the forces working between dislocations.	Students know how to calculate the forces acting on dislocations and the forces working between dislocations.	Students do not know how to calculate the forces acting on dislocations and the forces working between dislocations.
Forces acting between dislocations and solute atoms	Students can correctly calculate forces acting between dislocations and solute atoms.	Students can explain how to calculate forces acting between dislocations and solute atoms.	Students can not explain how to calculate forces acting between dislocations and solute atoms.
Dislocation multiplication, Cross slip, Double cross slip	Students can correctly explain dislocation multiplication, cross slip and double cross slip.	Students understand dislocation multiplication, cross slip and double cross slip.	Students do not know dislocation multiplication, cross slip and double cross slip.
Jog, Kink, Dislocation pile-up	Students can correctly explain Jog, Kink and Dislocation pile-up.	Students can correctly explain Jog, Kink and Dislocation pile-up.	Students do not know correctly explain Jog, Kink and Dislocation pile-up.
Cold working, Hot working	Students understand the difference between cold working and hot working, and can explain them correctly.	Students can explain the outline of cold working and hot working.	Students can not explain the outline of cold working and hot working.
Strengthening by solid solution, work hardening, precipitation strengthening, refinement of crystal grains	Students understand strengthen methods for metalic materials and can explain about Strengthening by solid solution, work hardening, precipitation strengthening and refinement of crystal grains.	Students can explain about strengthening by solid solution, work hardening, precipitation strengthening and refinement of crystal grains.	Students can not explain about Strengthening by solid solution, work hardening, precipitation strengthening and refinement of crystal grains.

Assigned Department Objectives

Learning and Educational Objectives of the “General Engineering” A-2 （設計・システム，情報・論理，材料・バイオ，力学，社会技術に関する基礎知識を理解し，簡単に説明することができる。）

JABEE 1(2)(d)(1) （専門工学（工学（融合複合・新領域）における専門工学の内容は申請高等教育機関が規定するものとする）の知識と能力）

JABEE 1(2)(d)(2) （いくつかの工学の基礎的な知識・技術を駆使して実験を計画・遂行し、データを正確に解析し、工学的に考察し、かつ説明・説得する能力）

JABEE 2.1(1) （基礎工学として、①設計・システム系科目群、②情報・論理系科目群、③材料・バイオ系科目群、④力学系科目群、⑤社会技術系科目群の５群からなり、各群から少なくとも１科目、合計最低６科目を含むこと。）

Diploma policy 1 （機械を構成する材料の物性，製造方法，加工・生産技術や，機械設計に欠かせない材料，熱，流体，機械の力学，電気・情報処理など，幅広い知識と技術，応用力を身につけ，それらを応用したものづくりができる。）

Teaching Method

Outline:

Dislocation theory is an esoteric subject in the field of materials science, but it is important knowledge for understanding the mechanism of plastic deformation and plastic working of metallic materials.

Style:

Lecture

Notice:

Students should earn a credit in subjects related to material science, plastic working and strength of materials.

Course Plan

			Theme	Goals
2nd Semester
	3rd Quarter
		1st	Slip system, Schmidt factor	Students understand slip system and Schmidt factor.
		2nd	Dislocation ①	Students understand the concept of plastic deformation and dislocation in crystals.
		3rd	Dislocation ②	Students understand edge dislocation, screw dislocation, mixed dislocation and Burgers vector.
		4th	Stress field around dislocation	Students understand stress field around edge dislocation and screw dislocation.
		5th	Force acting on dislocation ①	Students understand force acting on dislocation.
		6th	Force acting on dislocation ②	Students understand forces working between dislocations.
		7th	Force acting on dislocation ③	Students understand forces acting between dislocations and solute atoms, and Cottrell effect.
		8th	Dislocation multiplication, dislocation pile-up ①	Students understand Dislocation multiplication.
	4th Quarter
		9th	Dislocation multiplication, dislocation pile-up ②	Students understand cross slip, Jog and Kink of dislocations.
		10th	Dislocation multiplication, dislocation pile-up ③	Students understand Dislocation pile-up.
		11th	Strengthen methods for metallic materials ①	Students understand work hardening.
		12th	Strengthen methods for metallic materials ②	Students understand precipitation strengthening (Orowan mechanism).
		13th	Strengthen methods for metallic materials ③	Students understand strengthening by solid solution and refinement of crystal grains.
		14th	Cold working and hot working	Students understand cold working and hot working.
		15th	Final exam
		16th	Answer and explanation of the final exam

Evaluation Method and Weight (%)

	Examination	Report	Total
Subtotal	80	20	100
Basic Ability	40	10	50
Technical Ability	40	10	50