The effect of post weld heat treatment and distribution of residual stress in weld repaired high chromium steel (AISI 410) components
Olabi, Abdul-Ghani (1990) The effect of post weld heat treatment and distribution of residual stress in weld repaired high chromium steel (AISI 410) components. Master of Engineering thesis, Dublin City University.
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The aim of this work is to study the effect of Post
Weld Heat Treatment on the micostructural and strength
properties of high chromium steel [AISI 410] components.
This work also aims to estimate the magnitude and
distribution of the residual stress on the above type of
In introducing this work an extensive literature
survey on the historical development and the advantages
and disadvantages of welding process has been presented.
A review of the different technique which are used to
determine the residual stress is also presented.
In this work two types of Post Weld Heat Treatment
were used. in the first type of heat treatment, the
specimen was kept at 316°C for 30 min, then at 427°C for
30 min, and finally, at 546®C for 2 hrs. In the second
type of heat treatment the specimen was kept at 760 °C
for 2 hrs. Two types of specimens were used to simulate
build-up welding and crack repair conditions, each type
of these specimens have different parameters (thickness,
bead length and width).
Stress relaxation technique was used to detemine
the magnitude and distribution of the residual stresses
for the above specimens.
The results show that the first type of heat
treatment reduces the hardness in the welding zone by
about 15% of the hardness of the as welded specimen and
improves the tensile strength. The second type of heat
treatment decreases the hardness in the welding zone by
about 40% but decreases the tensile strength by about
The residual stress measurements show that there is
a tensile stress around the welded zone, and that the
greatest value recorded is about 72 N/mm*. These
residual stresses decrease as the distance from the
welding zone increases.
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