Details
| Original language | English |
|---|---|
| Pages (from-to) | 1220-1227 |
| Number of pages | 8 |
| Journal | Steel research international |
| Volume | 87 |
| Issue number | 9 |
| Publication status | Published - 7 Jan 2016 |
Abstract
In order to produce components with massive secondary functional elements from sheet metal bulk forming operations, termed sheet-bulk metal forming, can be applied. Owing to high, three-dimensional stress and strain states present during sheet-bulk metal forming, ductile damage occurs in the form of micro-voids. Depending on the material flow properties, tensile residual stresses can also be present in the components' formed functional elements. During service, the components are subjected to cyclic loading via these functional elements, and tensile residual stresses exert an unfavorable influence on crack initiation and crack growth, and therefore on the fatigue life. Following the forming process, temperature and microstructurally related compressive residual stresses can be induced by local heat treating of the surface. These residual stresses can counteract potential crack initiation on the surface or in the subsurface regions. In the present study, the adjustability of the residual stress state is investigated using a workpiece manufactured by orbital cold-forming, which possesses an accumulation of material in its edge region. Based on residual stress measurements in the workpiece's edge region using x-ray diffractometry, it is possible to verify the compressive residual stresses adjusted by varying the cooling conditions.
Keywords
- DP600, induction heat treatment, orbital forming, residual stress, water–air spray cooling
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: Steel research international, Vol. 87, No. 9, 07.01.2016, p. 1220-1227.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Induction Heat Treatment of Sheet-Bulk Metal-Formed Parts Assisted by Water–Air Spray Cooling
AU - Besserer, Hans Bernward
AU - Dalinger, Andrej
AU - Rodman, Dmytro
AU - Nürnberger, Florian
AU - Hildenbrand, Philipp
AU - Merklein, Marion
AU - Maier, Hans Jürgen
PY - 2016/1/7
Y1 - 2016/1/7
N2 - In order to produce components with massive secondary functional elements from sheet metal bulk forming operations, termed sheet-bulk metal forming, can be applied. Owing to high, three-dimensional stress and strain states present during sheet-bulk metal forming, ductile damage occurs in the form of micro-voids. Depending on the material flow properties, tensile residual stresses can also be present in the components' formed functional elements. During service, the components are subjected to cyclic loading via these functional elements, and tensile residual stresses exert an unfavorable influence on crack initiation and crack growth, and therefore on the fatigue life. Following the forming process, temperature and microstructurally related compressive residual stresses can be induced by local heat treating of the surface. These residual stresses can counteract potential crack initiation on the surface or in the subsurface regions. In the present study, the adjustability of the residual stress state is investigated using a workpiece manufactured by orbital cold-forming, which possesses an accumulation of material in its edge region. Based on residual stress measurements in the workpiece's edge region using x-ray diffractometry, it is possible to verify the compressive residual stresses adjusted by varying the cooling conditions.
AB - In order to produce components with massive secondary functional elements from sheet metal bulk forming operations, termed sheet-bulk metal forming, can be applied. Owing to high, three-dimensional stress and strain states present during sheet-bulk metal forming, ductile damage occurs in the form of micro-voids. Depending on the material flow properties, tensile residual stresses can also be present in the components' formed functional elements. During service, the components are subjected to cyclic loading via these functional elements, and tensile residual stresses exert an unfavorable influence on crack initiation and crack growth, and therefore on the fatigue life. Following the forming process, temperature and microstructurally related compressive residual stresses can be induced by local heat treating of the surface. These residual stresses can counteract potential crack initiation on the surface or in the subsurface regions. In the present study, the adjustability of the residual stress state is investigated using a workpiece manufactured by orbital cold-forming, which possesses an accumulation of material in its edge region. Based on residual stress measurements in the workpiece's edge region using x-ray diffractometry, it is possible to verify the compressive residual stresses adjusted by varying the cooling conditions.
KW - DP600
KW - induction heat treatment
KW - orbital forming
KW - residual stress
KW - water–air spray cooling
UR - http://www.scopus.com/inward/record.url?scp=84953775864&partnerID=8YFLogxK
U2 - 10.1002/srin.201500404
DO - 10.1002/srin.201500404
M3 - Article
AN - SCOPUS:84953775864
VL - 87
SP - 1220
EP - 1227
JO - Steel research international
JF - Steel research international
SN - 1611-3683
IS - 9
ER -