Homework Help is Here – Start Your Trial Now!
Engineering
Mechanical Engineering
Sketch: a. 3 stages of single crystal stress-strain curve under uniaxial stress b. Frank-Reed mechanism for dislocation multiplication.

Sketch: a. 3 stages of single crystal stress-strain curve under uniaxial stress b. Frank-Reed mechanism for dislocation multiplication.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
See similar textbooks
icon
Related questions
Question
100%
**Transcription for Educational Website:** 2. Sketch: a. 3 stages of single crystal stress-strain curve under uniaxial stress b. Frank-Reed mechanism for dislocation multiplication. **Explanation:** - **3 Stages of Single Crystal Stress-Strain Curve:** The stress-strain curve of a single crystal under uniaxial stress typically includes the following stages: 1. **Elastic Deformation:** Initially, the material deforms elastically where the stress and strain have a linear relationship. This stage is reversible when the applied stress is removed. 2. **Yielding and Plastic Deformation:** As the stress increases, yielding occurs, and the crystal undergoes plastic deformation. The stress-strain curve deviates from linearity, marking the transition from elastic to plastic behavior. 3. **Work Hardening:** Further deformation results in work hardening, where the material becomes stronger and more resistant to deformation due to the multiplication and interaction of dislocations. - **Frank-Reed Mechanism for Dislocation Multiplication:** The Frank-Reed mechanism is a process that describes the multiplication of dislocations in a crystal structure. It involves the following steps: 1. **Bowing Out of a Dislocation:** A stress is applied, causing a segment of a dislocation line pinned at both ends to bow out. 2. **Formation of a Dislocation Loop:** As the bowed-out segment continues to grow, it eventually forms a dislocation loop. 3. **Propagation and Multiplication:** The dislocation loop expands and leaves behind additional dislocations in the crystal, leading to multiplication which contributes to plastic deformation and work hardening. These phenomena are important in understanding the mechanical behavior of crystalline materials under stress and are fundamental concepts in materials science and engineering.
Transcribed Image Text:**Transcription for Educational Website:** 2. Sketch: a. 3 stages of single crystal stress-strain curve under uniaxial stress b. Frank-Reed mechanism for dislocation multiplication. **Explanation:** - **3 Stages of Single Crystal Stress-Strain Curve:** The stress-strain curve of a single crystal under uniaxial stress typically includes the following stages: 1. **Elastic Deformation:** Initially, the material deforms elastically where the stress and strain have a linear relationship. This stage is reversible when the applied stress is removed. 2. **Yielding and Plastic Deformation:** As the stress increases, yielding occurs, and the crystal undergoes plastic deformation. The stress-strain curve deviates from linearity, marking the transition from elastic to plastic behavior. 3. **Work Hardening:** Further deformation results in work hardening, where the material becomes stronger and more resistant to deformation due to the multiplication and interaction of dislocations. - **Frank-Reed Mechanism for Dislocation Multiplication:** The Frank-Reed mechanism is a process that describes the multiplication of dislocations in a crystal structure. It involves the following steps: 1. **Bowing Out of a Dislocation:** A stress is applied, causing a segment of a dislocation line pinned at both ends to bow out. 2. **Formation of a Dislocation Loop:** As the bowed-out segment continues to grow, it eventually forms a dislocation loop. 3. **Propagation and Multiplication:** The dislocation loop expands and leaves behind additional dislocations in the crystal, leading to multiplication which contributes to plastic deformation and work hardening. These phenomena are important in understanding the mechanical behavior of crystalline materials under stress and are fundamental concepts in materials science and engineering.
Expert Solution
Step 1

Mechanical Engineering homework question answer, step 1, image 1

steps

Step by step

Solved in 3 steps with 3 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY
SEE MORE TEXTBOOKS