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Title of Journal: Metall and Mat Trans A

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Abbravation: Metallurgical and Materials Transactions A

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Springer US

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DOI

10.1002/mrc.1270200306

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1543-1940

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Hardness Evolution of GammaIrradiated Polyoxymeth

Authors: ChuanHao Hung Julie P Harmon Sanboh Lee
Publish Date: 2016/04/25
Volume: 47, Issue: 12, Pages: 5876-5881
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Abstract

This study focuses on analyzing hardness evolution in gammairradiated polyoxymethylene POM exposed to elevated temperatures after irradiation Hardness increases with increasing annealing temperature and time but decreases with increasing gamma ray dose Hardness changes are attributed to defects generated in the microstructure and molecular structure Gamma irradiation causes a decrease in the glass transition temperature melting point and extent of crystallinity The kinetics of defects resulting in hardness changes follow a firstorder structure relaxation The rate constant adheres to an Arrhenius equation and the corresponding activation energy decreases with increasing dose due to chain scission during gamma irradiation The structure relaxation of POM has a lower energy barrier in crystalline regions than in amorphous ones The hardness evolution in POM is an endothermic process due to the semicrystalline nature of this polymer

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Other Papers In This Journal:
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  2. Influence of Sintering under Nitrogen Atmosphere on Microstructures of Powder Metallurgy Duplex Stainless Steels
  3. Temperature Dependence of Diffuse Scattering in PZN
  4. Synthesis and Characterization of Novel Chromium-Free Nickel Alloy Electrode Materials
  5. Synthesis and Characterization of Novel Chromium-Free Nickel Alloy Electrode Materials
  6. Dynamic Stress–Strain Behavior in ZrTiCuNiAl Noncrystalline Alloys Pretreated Under High Pressures
  7. XPS Analysis of Ti6Al4V Oxidation Under UHV Conditions
  8. Effect of Sr Additions on the Microstructure and Strength of a Mg-Al-Ca Ternary Alloy
  9. Foreword
  10. Failure during Sheared Edge Stretching of Dual-Phase Steels
  11. Computer-Aided Development and Simulation Tools for Shape-Memory Actuators
  12. Computer-Aided Development and Simulation Tools for Shape-Memory Actuators
  13. Effect of Application of Short and Long Holds on Fatigue Life of Modified 9Cr-1Mo Steel Weld Joint
  14. Effects of Alloying Elements on Microstructure and Properties of Magnesium Alloys for Tripling Ball
  15. Microstructural Control of Ti-Al-Nb-W-B Alloys
  16. Three-Dimensional Thermomechanical Simulation and Experimental Validation on Failure of Dissimilar Material Welds
  17. The Role of Σ9 Boundaries in Grain Boundary Engineering
  18. Controlling Plastic Flow across Grain Boundaries in a Continuum Model
  19. Microstructural Evolution during Creep of Alloy 800HT in the Temperature Range 600 °C to 1000 °C
  20. Mechanical Properties of the TiAl IRIS Alloy
  21. Precipitation Modeling in Nitriding in Fe-M Binary System
  22. Glass-Forming Ability for Mg-Cu-Nd Alloys
  23. Kinetics of the γ →  ε Martensitic Transformation in Fine-Grained Fe-26Mn-0.14C Austenitic Steel
  24. Nanoscale Copper and Copper Compounds for Advanced Device Applications
  25. A Geometric Framework for Mesoscale Models of Recrystallization
  26. Microstructure Evolution and Rapid Solidification Behavior of Blended Nickel-Based Superalloy Powders Fabricated by Laser Powder Deposition
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  28. Effect of Alloying Additions on Phase Equilibria and Creep Resistance of Alumina-Forming Austenitic Stainless Steels
  29. Deformation Mechanisms in the Near- β Titanium Alloy Ti-55531
  30. Shape Memory Behavior of Porous NiTi Alloy
  31. Effect of Laves Phase on High-Temperature Deformation and Microstructure Evolution in an 18Cr-2Mo-0.5Nb Ferritic Stainless Steel
  32. Effect of Graphene Nanoplatelets on Wetting, Microstructure, and Tensile Characteristics of Sn-3.0Ag-0.5Cu (SAC) Alloy
  33. Alternate Anodes for the Electrolytic Reduction of UO 2
  34. Measurement and Discussion of Low-Temperature Hot Corrosion Damage Accumulation upon Nickel-Based Superalloy Rene 104
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  37. Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods
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  39. Carbide Precipitation During Tempering of a Tool Steel Subjected to Deep Cryogenic Treatment
  40. Multipass Friction-Stir Processing and its Effect on Mechanical Properties of Aluminum Alloy 5086
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  48. Role of Slip Mode on Stress Corrosion Cracking Behavior
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  53. Mechanism of Oxidation of Austenitic Stainless Steels under Conditions of Hot Rolling in Steckel Mills
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  63. Relationship Between Microstructure, Strength, and Fracture in an Al-Zn-Mg Electron Beam Weld: Part I: Microstructure Characterization
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