About new book "High-strength materials for threaded fasteners"

01.04.2016

At the conference "Fasteners. Quality and responsibility. Anchor fasteners in construction”, held on 16 March 2016 in St. Petersburg, an advance copy of the new book "High-strength materials for threaded fasteners" was presented. This monograph was introduced by its author – Professor Vladimir Gorynin, Doctor of Technical Sciences, an expert on operability of fastening materials and threaded connections of them.

Below you can find the index of contents.

Duplicating of the book is planned for autumn 2016.

Applications for the purchase of this book can be sent by you to e-mail: fast@fastinfo.ru with pointing the subject "Book order".

 

SUMMARY

The book “High-strength materials for threaded fasteners” of Professor Vladimir Gorynin, PhD, presents new scientific and methodological approach based on fracture mechanics criteria justifying technical requirements to materials high-resistant to cyclic and brittle fracture for loaded threaded fasteners.

Structural and technological aspects of the design and manufacture and also test results for threaded and flanged joints made of high-strength materials have been analyzed considering the effect of their structural and mechanical state on working capacity, operability and reliability in the mode of unstable loading.

Calculation methods for stress and strain concentration in thread fasteners have been proposed and tested complying with the redistribution of load in thread turns under the low-cycle fatigue of joints’ materials with different cyclic properties.

The ways of constructive and technological improvement of threaded connections, provided by high deformability of high-strength fastening materials, have been analyzed. The point is to reduce the impact of load redistribution per threads and thus increase the efficiency of thread when tightening (including stress intensity reduction while minimizing metal notch and crack sensitivity in the most highly loaded threads).

The monograph covers a wide range of issues of enhancement of high-strength steels for fasteners and evaluation of threaded joints performance. It is recommended for students, graduate students, engineers and researchers engaged in metallurgy and materials science for general and power engineering, marine, petrochemical, automobile, tractor, construction and other branches of engineering.

The head of the scientific school in the field of research of resistance to deformation and fracture of materials for threaded joints, as well as of methods to increase cold resistance of structural steels by carbide-ordered structure, Vladimir Gorynin is the author and the co-author of over 130 scientific publications, reviews and more than 40 patents and patent applications.

 

Index of the book "High-strength materials for threaded fasteners" by V. Gorynin

FOREWORD

INTRODUCTION

Chapter 1
MATERIALS FOR THREADED FITTINGS IN PUBLIC MACHINE BUILDING AND NUCLEAR POWER ENGINEERING
1.1. Operating conditions for threaded fittings in public machine building and nuclear power engineering
1.1.1. Fasteners for WWER
1.1.2. Fasteners for fast neutron reactors
1.1.3. Material specifications for fasteners’ material
1.2. Fasteners for national and foreign NPP
1.2.1. Materials for bolts and studs
1.2.2. Materials for nuts and washers
1.2.3. Materials for reactor vessels
1.2.3.1. Materials for reactor vessels of WWER
1.2.3.2. Materials for fast neutron reactors vessels
1.2.3.3. Steels and alloys of low activation
1.3. Prospects of titanium fasteners

Chapter 2
STATIC STRENGTH OF THE THREADED FITTINGS
2.1. Strength evaluation methods
2.1.1. Types of fasteners’ destruction
2.1.2. The strength of the bar studs (bolts)
2.2. The effect of the screwing length on the static strength of the threaded fasteners made of 38KhN3MFA and 25Khl MF steels
2.3. Tests on static stretching of the M170 threaded connection
2.4. The scheme of loading
2.4.1. Determination of strain
2.4.2. Processing of measurement results
2.5. Tests to M170 threads cuts
2.5.1. Loading conditions
2.5.2. Results of experiments and its analysis
2.6. Calculation and experimental evaluation for the strength of sleeve-nut threaded joints destined for pretensioning system for protective shell of NPP power unit
2.6.1. Fasteners’ materials and test methods
2.6.2. The efficiency of the threaded reinforced anchor
2.6.3. Strength analysis of sleeve-nut threaded joints with geometric deviation
2.6.3.1. Permissible voltage
2.6.3.2. Collapse pressure calculation

Chapter 3
CONCENTRATION AND STRESS INTENSITY COEFFICIENTS IN THREADED JOINTS
3.1. Engineering calculating method of the coefficients of stressconcentration...
3.2. Stress intensity coefficient
3.3. Experimental calculation of elastic stress concentration and stress intensity coefficients

Chapter 4
RESISTANCE TO BRITTLE AND DUCTILE FRACTURE OF HIGH- STRENGTH FASTENING MATERIALS
4.1. Chemical composition and mechanical properties of domestic and foreign steels for fasteners
4.2. Influence of structure on resistance to brittle fracture of steels for fasteners
4.2.1. Effect of temperature of heating on quenching
4.2.2. Cooling rate during quenching
4.2.3. Parameters of temperature and timing of tempering
4.2.4. Effect of the chemical composition and structure on the resistance of Cr-Ni-Mo-V steel on brittle fracture
4.3. 38KhN3MFA and 25KhlMF steels of various alloying levels and structural and mechanical state
4.3.1. Chemical composition and service properties
4.3.2. Modeling the structure during quenching of billets in different cooling mediums
4.3.3. Thermokinetic charts and curves of cooling
4.4. Experimental methods for evaluation of resistance of steel fasteners to brittle fracture
4.4.1. Testing by drop weight
4.4.2. Test method for impact strength
4.4.3. Evaluation criteria for cold resistance of high-strength steels for fasteners. Justification of selection
4.5. Criteria selection and evaluation for fracture toughness of high-strength steel for fasteners
4.5.1. Limiting diagram for the bodies with cracks
4.5.2. Influence of various factors on steel fracture toughness at break and longitudinal shift
4.5.2.1. Crack resistance at break
4.5.2.2. Influence of various factors on the fracture toughness of steel for fasteners at longitudinal shift
4.6. Structural diagrams for resistance of 38KhN3MFAand 25Kh 1MF steels to brittle fracture
4.7. Fracture toughness evaluation for threaded joints
4.7.1. Choice justification of the thread material and its geometry
4.7.2. Allowable values of the critical temperature of brittleness
4.8. Estimation of acceptable values of the critical temperature
of brittleness according to the level of defectiveness of threaded connection and impact of the sample

Chapter 5
RESISTANCE CYCLIC DEFORMATION AND DESTRUCTION OF HIGH FASTENERS AND THREADED CONNECTIONS
5.1. Methods of testing for threaded joints
5.2. The influence of critical temperature margin of fastener’s brittleness on the resistance of the threaded joints to low-cycle fatigue
5.3. The impact of the nut material on the strength of the threaded connection under the low-cycle loading
5.4. Influence of scale factor on the resistance of the threaded joint “bolt-nut” to low-cycle fatigue
5.5. Effect of structures of the threaded connection
5.6. Effect of thread geometry on the low-cycle fatigue
5.7. Effect of the length of screwing
5.8. Empirical equation of fatigue curve and diagram of cyclic strength of fasteners with low-cycle fatigue loading of the threaded joint
5.9. Engineering evaluation of the concentration of strain in the thread fasteners under the low-cycle loading
5.9.1. Definition of the parameter К (m)
5.9.2. Estimation of low-cycle fatigue of the threaded connections

Chapter 6
CYCLIC STRENGTH OF RADIATION-HARDENED FASTENING MATERIALS FOR FAST NEUTRON REACTORS
6.1. Mechanical properties of fasteners’ materials KhN35VT and 08КЫ8Н10Т
6.1.1. Initial state
6.1.2. Irradiated state
6.1.3. Modeling of irradiated state
6.2. Evaluation of residual life of enhanced radiation-hardened metal fasteners subject to the conditions of loading
6.3. Evaluation based on calculation and experimental results of strain concentration of fasteners’ metal with different dose of radiation hardening under the low-cycle loading of the threaded connection

Chapter 7
CORROSIVE LOW-CYCLE FATIGUE OF THE THREADED JOINTS WITH PROTECTIVE COATINGS
7.1. Corrosion damageability of fasteners
7.2. Metal amorphous-microcrystalline coatings, methods for their preparation and use
7.3. Materials and corrosion resistance of the coatings
7.4. Adhesion-cohesive strength of amorphous-microcrystalline Ni-P coatings
7.5. Low-cycle fatigue of fasteners with anticorrosive coating
7.6. Corrosion fatigue strength of fasteners’ materials after hardening (ion implantation of titanium nitride coatings
7.6.1. Fatigue strength of uncoated 18KhllMNFB (EP291) steels and with Ti / TiN and TiAlZrMo / TiAlZrMo-N coatings
7.6.1.1. Test methodology
7.6.1.2. Test results
7.6.2. Corrosion fatigue strength of EP291 steel with Ti / TiN and TiAlZrMo / (TiAlZrMo)N coatings after stand-by corrosion in a 1% NaCl solution 328
7.6.3. Corrosion fatigue strength of EP291 steel with Ti / TiN and Ti A1 Zr Mo / (Ti A1 Zr Mo)N coatings after testing in the vapor medium at temperatures 470 and 560°C, respectively
7.6.3.1. Test methodology
7.6.3.2. Test results
7.6.3.3. Metallographic results of samples with coatings after fatigue test

Chapter 8
HIGH-STRENGTH TITANIUM FASTENERS
8.1. Short-term mechanical properties of titanium alloys of ВТ-16 type, and Ti-Al-Mo-Zr-Nb-type
8.2. Relaxation resistance of titanium alloys for fasteners
8.2.1. Ring sample
8.2.2. Threaded joint
8.3. Fracture toughness of titanium alloys of ВТ-16 type, and Ti-Al-Mo-Zr-Nb-type
8.4. Effect of thread geometry
8.5. Evaluation based on calculation and experimental results of low-cycle durability
8.6. Influence of test temperature
8.7. Effect of the corrosion vapor medium
8.8. Design and manufacture of titanium fasteners, given its fatigue strength

Chapter 9
HOW TO IMPROVE RESISTANCE TO DEFORMATION AND FRACTURE OF HIGH-STRENGTH FASTENERS
9.1. Main directions
9.2. Perspectives
9.2.1. The method of transformation of carbide-cementite phase as a factor in increasing resistance to brittle fracture of fasteners’ steel

REFERENCES

SUMMARY