Simulation and evaluation of thermal fatigue cracking of hot work tool steels

2004 ◽  
Vol 26 (10) ◽  
pp. 1095-1107 ◽  
Author(s):  
A PERSSON
Keyword(s):  
Thermal Fatigue ◽  
Fatigue Cracking ◽  
Tool Steels ◽  
Simulation And Evaluation ◽  
Hot Work Tool Steels

Thermal fatigue cracking of surface engineered hot work tool steels

2005 ◽  
Vol 191 (2-3) ◽  
pp. 216-227 ◽  
Author(s):  
Anders Persson ◽  
Sture Hogmark ◽  
Jens Bergström
Keyword(s):  
Thermal Fatigue ◽  
Fatigue Cracking ◽  
Tool Steels ◽  
Hot Work Tool Steels

scholarly journals The Influence of Laser Surface Alloying on the Thermal Fatigue Resistance of Hot Work Tool Steels

2016 ◽  
Vol 61 (3) ◽  
pp. 1309-1314 ◽  
Author(s):  
E. Jonda ◽  
Z. Brytan ◽  
K. Labisz ◽  
A. Drygała
Keyword(s):  
Surface Layer ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Laser Surface ◽  
Strengthening Effect ◽  
Surface Alloying ◽  
Tool Steels ◽  
Laser Surface Alloying ◽  
Thermal Fatigue Resistance ◽  
Hot Work Tool Steels

Abstract The paper presents results of the effect of laser surface remelting and alloying by carbides powders of NbC, TaC, TiC, VC and WC on the structure and thermal fatigue resistance of the surface layer of hot work tool steels X40CrMoV5-1 and 32CrMoV12-28. The laser surface alloying and remelting treatments was performed using a high power diode laser (HPDL ROFIN SINAR DL 020). In order to investigate the effect of applied laser treatments and used alloying powders on the microstructure and thermal fatigue resistance of processed surface layer of hot work tool steels, the microstructure evaluation by light microscopy, hardness test, and dedicated thermal fatigue resistance test were performed. The best results regarding fatigue cracks inhibition was obtained when the surface of hot work tool steels was alloyed with TiC and VC carbides at the laser beam power of 2.0 and 2.3 kW. The grain refinement effect of laser remelting has a lower impact on the thermal crack inhibition, than a strong strengthening effect of matrix saturation in alloying elements and precipitation of fine carbides in the steel matrix.

Numerical modelling and physical simulation of the softening behaviour of hot work tool steels during thermal fatigue

2004 ◽  
Vol 120 ◽  
pp. 649-656
Author(s):  
I. Siller ◽  
W. Waldhauser ◽  
R. Ebner
Keyword(s):  
Thermal Fatigue ◽  
Physical Simulation ◽  
Fatigue Testing ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Tool Steels ◽  
Chaboche Model ◽  
Different Temperatures ◽  
Pull Tests ◽  
Hot Work Tool Steels

Fatigue due to thermal cycling is one of the main reasons for the damage of tools used in die casting processes. In order to investigate the thermal fatigue behaviour of tool steels a thermal fatigue testing facility was designed and built up. For better understanding of the mechanisms of thermal fatigue finite element-simulations were carried out. To specify the cyclic material behaviour push-pull-tests at different temperatures were performed. The Chaboche-model was used to describe the kinematic material response. Isotropic softening is also taken into account. Depending on the arising accumulated plastic strain stable cyclic deformation or continuous softening occurs. The results are consistent with the accomplished thermal fatigue tests on different hot work tool steels.

Thermal fatigue properties of hot-work tool steels

2008 ◽  
Vol 3 (2/3) ◽  
pp. 363 ◽  
Author(s):  
M. Pellizzari ◽  
A. Molinari ◽  
D. Cescato ◽  
A. Ghidini ◽  
S. Cantini
Keyword(s):  
Thermal Fatigue ◽  
Fatigue Properties ◽  
Tool Steels ◽  
Hot Work Tool Steels

Thermal Fatigue Studies Using HF Induction Heating of Die Materials for Light Metals Casting

2009 ◽  
Vol 618-619 ◽  
pp. 357-360 ◽  
Author(s):  
Stefan Gulizia ◽  
Darryl Jones ◽  
Mahnaz Z. Jahedi ◽  
Trevor Kearney ◽  
Paul Koltun
Keyword(s):  
Induction Heating ◽  
Thermal Fatigue ◽  
Fatigue Cracks ◽  
Fatigue Cracking ◽  
Net Energy ◽  
Crack Morphology ◽  
Die Materials ◽  
Die Material ◽  
Thermal Fatigue Cracks ◽  
Hot Work Tool Steels

In this study a new thermal fatigue test rig has been developed that can apply a net energy input to materials with different physical properties using HF induction heating. Several commercially available hot work ferrous and non-ferrous die materials were evaluated with the aim of providing a basis for selecting an appropriate die material with good thermal fatigue resistance for a given HPDC application. The results show materials with high thermal conductivity such as tungsten-based materials are more resistant to thermal fatigue cracking than conventionally used hot work tool steels for HPDC dies. The initiation and growth of thermal fatigue cracks were examined and periodically evaluated using computer image analysis, for crack morphology, and hardness on each material tested.

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