INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Residual stress analysis in PVD coated austempered ductile iron
Autor/es:
D.A. COLOMBO; M.D. ECHEVERRíA; O.J. MONCADA; J.M. MASSONE
Revista:
ISIJ INTERNATIONAL
Editorial:
IRON STEEL INST JAPAN KEIDANREN KAIKAN
Referencias:
Lugar: Tokio; Año: 2012 vol. 53 p. 520 - 526
ISSN:
0915-1559
Resumen:
The aim of this work is to study residual stresses (RS) in PVD TiN and CrN coated ADI substrates with
different nodule counts, austempering temperatures and surface finishing methods (grinding and polishing).
Coatings were applied by arc ion plating using an industrial reactor and different sets of processing
parameters. Residual stress measurements were performed by x-ray diffraction using the sin2ø method
along two principal axes on the samples surface (parallel and perpendicular to the substrate abrasion
direction). The film thickness, hardness and adhesion of each coated sample were also evaluated.
The results obtained indicate that RS in TiN and CrN coated samples are compressive irrespective of
the different substrates, surface finishing methods and processing parameters utilized. The parallel and
perpendicular RS do not vary significantly, indicating a rotationally symmetric biaxial stress state. The RS
of the coated samples are not influenced by the different substrate characteristics regarding microstructure,
hardness and surface roughness. The microhardness and RS of TiN and CrN coated samples
increase with film thickness. The increase in substrate temperature together with the decrease in the values
of BIAS voltage, arc current and chamber pressure lead to microhardness and RS reduction. Grinding
produces surface hardening and reduction of the compressive RS in the substrates, but causes no variations
in the RS of the TiN and CrN coated samples. The adhesion strength quality of TiN and CrN coatings
to ADI substrates can be related to indices ranging from HF1 to HF2.
along two principal axes on the samples surface (parallel and perpendicular to the substrate abrasion
direction). The film thickness, hardness and adhesion of each coated sample were also evaluated.
The results obtained indicate that RS in TiN and CrN coated samples are compressive irrespective of
the different substrates, surface finishing methods and processing parameters utilized. The parallel and
perpendicular RS do not vary significantly, indicating a rotationally symmetric biaxial stress state. The RS
of the coated samples are not influenced by the different substrate characteristics regarding microstructure,
hardness and surface roughness. The microhardness and RS of TiN and CrN coated samples
increase with film thickness. The increase in substrate temperature together with the decrease in the values
of BIAS voltage, arc current and chamber pressure lead to microhardness and RS reduction. Grinding
produces surface hardening and reduction of the compressive RS in the substrates, but causes no variations
in the RS of the TiN and CrN coated samples. The adhesion strength quality of TiN and CrN coatings
to ADI substrates can be related to indices ranging from HF1 to HF2.
along two principal axes on the samples surface (parallel and perpendicular to the substrate abrasion
direction). The film thickness, hardness and adhesion of each coated sample were also evaluated.
The results obtained indicate that RS in TiN and CrN coated samples are compressive irrespective of
the different substrates, surface finishing methods and processing parameters utilized. The parallel and
perpendicular RS do not vary significantly, indicating a rotationally symmetric biaxial stress state. The RS
of the coated samples are not influenced by the different substrate characteristics regarding microstructure,
hardness and surface roughness. The microhardness and RS of TiN and CrN coated samples
increase with film thickness. The increase in substrate temperature together with the decrease in the values
of BIAS voltage, arc current and chamber pressure lead to microhardness and RS reduction. Grinding
produces surface hardening and reduction of the compressive RS in the substrates, but causes no variations
in the RS of the TiN and CrN coated samples. The adhesion strength quality of TiN and CrN coatings
to ADI substrates can be related to indices ranging from HF1 to HF2.
2ø method
along two principal axes on the samples surface (parallel and perpendicular to the substrate abrasion
direction). The film thickness, hardness and adhesion of each coated sample were also evaluated.
The results obtained indicate that RS in TiN and CrN coated samples are compressive irrespective of
the different substrates, surface finishing methods and processing parameters utilized. The parallel and
perpendicular RS do not vary significantly, indicating a rotationally symmetric biaxial stress state. The RS
of the coated samples are not influenced by the different substrate characteristics regarding microstructure,
hardness and surface roughness. The microhardness and RS of TiN and CrN coated samples
increase with film thickness. The increase in substrate temperature together with the decrease in the values
of BIAS voltage, arc current and chamber pressure lead to microhardness and RS reduction. Grinding
produces surface hardening and reduction of the compressive RS in the substrates, but causes no variations
in the RS of the TiN and CrN coated samples. The adhesion strength quality of TiN and CrN coatings
to ADI substrates can be related to indices ranging from HF1 to HF2.