本书旨在将一种新型的无损检测方法，即金属磁记忆技术引入到再制造工程领域，为再制造产品的质量控制提供指导。书中详细介绍了金属磁记忆的研究现状及其在再制造中的应用前景，阐述了如何利用磁记忆信号检测再制造之前毛坯的损伤程度，分析了不同载荷形式和环境变化对检测结果的影响；并且对再制造之后零部件修复质量开展了系统评价，建立了磁记忆信号特征与再制造涂层及其界面性能之间的映射关系；最后根据金属磁记忆基本原理开发了一套高精度的磁信号检测设备，并将书中总结提出的磁记忆理论模型、分析方法以及检测结果推广到汽车驱动桥壳、液压缸、发动机曲轴等零部件的实际再制造过程中，为金属磁记忆在再制造工程中的应用奠定坚实基础。

Part I Introduction to the Metal Magnetic Memory (MMM) Technique
1 Nondestructive Testing for Remanufacturing
1.1 Motivations
1.2 Conventional Nondestructive Testing Techniques
1.3 MMM Technique
1.4 Organization of This Book
References
2 Theoretical Foundation of the MMM Technique
2.1 Background
2.2 Microscopic Mechanism
2.3 Macroscopic Theoretical Model
2.3.1 Magnetomechanical Model
2.3.2 Magnetic Charge Model
2.3.3 First Principle Theory
References
3 State of the Art of the MMM Technique
3.1 Historical Background
3.2 Theoretical Research
3.3 Experimental Research
3.4 Standard Establishment
3.5 Applications for Remanufacturing
3.6 Problems and Prospects
References
Part II Detection of Damage in Ferromagnetic Remanufacturing Cores by the MMM Technique
4 Stress Induces MMM Signals
4.1 Intxoductioii
4.2 Variations in the MMM Signals Induced by Static Stress
4.2.1 Under the Elastic Stage
4.2.2 Under the Plastic Stage
4.2.3 Theoretical Analysis
4.3 Variations in the MMM Signals Induced by Cyclic Stress
4.3.1 Under Different Stress Cycle Numbers
4.3.2 Characterization of Fatigue Crack Propagation
4.4 Conclusions
References
5 Frictional Wear Induces MMM Signals
5.1 Introduction
5.2 Reciprocating Sliding Friction Damage
5.2.1 Variations in the Tribology Parameters During Friction
5.2.2 Variations in the Magnetic Memory Signals Parallel to Sliding
5.2.3 Variations in the Magnetic Memory Signals Normal to Sliding
5.2.4 Relationship Between the Tribology
Characteristics and Magnetic Signals
5.3 Single Disassembly Friction Damage
5.3.1 Surface Damage and Microstructure Analysis
5.3.2 Variations in the MMM Signals
5.3.3 Damage Evaluation of Disassembly
5.3.4 Verification for Feasibility and Repeatability
5.4 Conclusions
References
6 Stress Concentration Impacts on MMM Signals
6.1 Introduction
6.2 Stress Concentration Evaluation Based on the Magnetic Dipole Model
6.2.1 Establishment of the Magnetic Dipole Model
6.2.2 Characterization of the Stress Concentration Degree
6.2.3 Contributions of Stress and Discontinuity to MMM Signals
6.3 Stress Concentration Evaluation Based on the Magnetic Dual-Dipole Model
6.3.1 Magnetic Scalar Potential
6.3.2 Magnetic Dipole and Its Scalar Potential
6.3.3 Measurement Process and Results
6.3.4 Analysis of the Magnetic Scalar Potential
6.4 Stress Concentration Inversion Method
6.4.1 Inversion Model of the Stress Concentration Based on the Magnetic Source Distribution
6.4.2 Inversion of a One-Dimensional Stress Concentration
6.4.3 Inversion of a Two-Dimensional Stress Concentration
6.5 Conclusions
References
7 Temperature Impacts on MMM Signals
7.1 Introduction
7.2 Modified J-A Model Based on Thermal and Mechanical Effects
7.2.1 Effect of Static Tensile Stress on the Magnetic Field
7.2.2 Effect of Temperature on the Magnetic Field
7.2.3 Variation in the Magnetic Field Intensity
7.3 Measurement of MMM Signals Under Different Temperatures
7.3.1 Material Preparation
7.3.2 Testing Method
7.4 Variations in MMM Signals with Temperature and Stress
7.4.1 Normal Component of the Magnetic Signal
7.4.2 Mean Value of the Normal Component of the Magnetic Signal
7.4.3 Variation Mechanism of the Magnetic Signals Under Different Temperatures
7.4.4 Analysis Based on the Proposed Theoretical Model
7.5 Conclusions
References
8 Applied Magnetic Field Strengthens MMM Signals
8.1 Introduction
8.2 MMM Signal Strengthening Effect Under Fatigue Stress
8.2.1 Variations in the MMM Signals with an