Rabkina M. Effect of structural-mechanical anisotropy of steel rolled metal on resistance against lamellar fractures of welded joints.

Українська версія

Thesis for the degree of Doctor of Science (DSc)

State registration number

0507U000319

Thesis Registration Form

0507U000319.pdf

Applicant for

Rabkina Mar'yana Danylivna

Specialization

05.03.06 - 3варювання та споріднені процеси і технології

Date of defense

17-05-2007

Specialized Academic Board

Д 26.182.01

E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine

Essay

The thesis is devoted to the study of laws of initiation and propagation of lamellar fractures of welded joints and to the development of theoretical principles and technological ways of their prevention at all stages of manufacture and service of welded structures, depending on texture of the parent metal and service conditions, including temperature, loading and effect of hydrogen-containing environments. It was established that two types of lamellar cracking are revealed: low-temperature and high -temperature. The main cause of initiation of a low-temperature lamellar cracking is the increased density in steel rolled metal of a family of crystallographic planes of cleavage {001} <011>. It was found that the allowed service life of structures after long-term service in hydrogen-containing environments is defined by the degree of damage of a casing wall by lamellar-hydrogen cracks. Depending on their relative sizes, fracture toughness and thickness of layer of "healthy metal", they can either propagate or to acquire without propagation a shape of bubbles. Relation was established between the resistance to lamellar fracture and structural elements of HAZ in welded joints of low-alloyed steels, resulting in the development of calculation methods of assessment of characteristics of crack resistance K1C and (1C from the results of standard mechanical tests with account for sizes of structural elements.

Thesis supervisor

Lobanov L.M.

Official opponents

Похмурський В.І.
Красовський А.Я.
Кир'ян В.І.
Дворецький В.І

Files

01 Содержание С.2-5.doc

02 Сокращения С.6-7.doc

03 ВВЕДЕНИЕ С. 8-18.doc

04 Г. С. 19-53.doc

05 Г.2.1-2.3 С. 54-70.doc

06 Г.2.4-2.8 С. 71-117.doc

07 Г.3.1-3.3 С.118-133.doc

08 Г.3.3-3.4 С.134-150.doc

09 Г3.5 С.151-161.doc

10 Г.3.6-3.7 С.162-170.doc

11 Г.4.1-4.3.2 С. 171-189.doc

12 Г.4.3.3 С.190-199.doc

13 Г.4.3.4-4.3.5 С.200-219.doc

14 Г.4.4 С.220-235.doc

15 Г.4.5. С.236-246.doc

16 Г.4.6 С.247-256.doc

17 Г.4 С. 257-271.doc

18 Г.4 С.272-286.doc

19 ВЫВОДЫ С.287-289.doc

20 ЛИТЕРАТУРА С.290-315.doc

21 ПРИЛОЖЕНИЯ С. 316.doc

Автореферат.doc

Акт внедрения.doc

Приложение А. С. 317-319.doc

Приложение Б. С. 320.doc

Приложение Б. С. 321-328.doc

Приложение В. С. 329-350.doc

Приложение Д. С. 351-378.doc

Рис. 4.19 - 4.21.С. 214.doc

Рис. 4.24. С. 224.doc

Рис. 4.26. С.234.doc

Рис. 4.5 С. 186.doc

Рис. Б.10 С. 326.doc

Рис. В.10. C. 338.doc

Рис. В.22. С. 350.doc

Рис. Д.5. С. 354.doc

Рис.1. С. 9.doc

Рис.1.4 С.34.doc

Рис.2.15 С. 87.doc

Рис.2.19 С. 106.doc

Рис.2.20 С. 108.doc

Рис.2.21 С. 113.doc

Рис.2.8 C. 69.doc

Рис.2.9 С. 74.doc

Рис.4.22 и 4.23 С. 222.doc

Рис.4.3, 4.4 С. 184.doc

Т. 1.2 С.29.doc

Т. 2.4 С. 82.doc

Т. 3.11-3.14 С.149-150.doc

Т. 4.1. С. 177.doc

Т. 4.11 С. 202.doc

рис. 4.6. С.189.doc

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