Importance of regarding the field failure behaviour of automotive components

The Indonesian government has set the motor vehicle industry as one of the priority industries of the national interest, economic growth, and increased productivity. In order for the survival of a company is maintained, then the management should be able to maintain or even more spur increased performance. Various analyzes were developed to predict the beginning of the bankruptcy of the company. One analysis is widely used today is the analysis of Altman Z-Score, which this analysis refers to the financial ratios of the company. The purpose of this study was to analyze the bankruptcy of the automotive components companies that go public in Indonesia Stock Exchange year period 2011–2015. This study used a sample of four companies from the automotive components sector. Source of data is done by using secondary data. The data is processed by the method of the Z-score formula Z = 1,2X1 + 1,4X2 + 3,3X3 + 0,6X4 + 0,999X5. With the description of Z < 1,8 the company categorized into unhealthy/will be bankrupt, the value Z 1,8 < 2,99 the company is considered to be in the uncertain/grey area and the value of Z > 2,99 then the company is in a very healthy. In general, the results of these studies indicate that the four automtive components companies namely PT Astra Otoparts year 2011 value of Z = 14,67 year 2012 value of Z = 10,88 year 2013 value of Z = 13,90 year 2014 value of Z = 10,54 year 2015 value of Z = 4,94, PT Gajah Tunggal year 2011 value of Z = 5,72 year 2012 value of Z = 4,75 year 2013 value of Z = 3,10 year 2014 value of Z = 2,79 year 2015 value of Z = 1,58 and the average value of 2011-2015 periode Z = 3,59, PT Goodyear Indonesia year 2011 value of Z = 2,07 year 2012 value of Z = 2,44 year 2013 value of Z = 2,57 year 2014 value of Z = 2,02 year 2015 value of Z = 2,76, PT Indomobil Sukses Internasional year 2011 value of Z = 6,19 year 2012 value of Z = 3,99 year 2013 value of Z = 3,17 year 2014 value of Z = 2,59 year 2015 value of Z = 1,74. The average value 2011-2015 period showed 3 companies are in very healthy state and 1 company is in the uncertain/grey area. Keywords: Financial Ratio Analysis, Analysis of bankruptcy, Altman Z-Score Analysis, Automotive Components Company, Go Public.

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Reliability Prediction Based on Field Failure Data of Guided Missile

Journal of Applied Reliability ◽

10.33162/jar.2018.09.18.3.250 ◽

2018 ◽

Vol 18 (3) ◽

pp. 250-259 ◽

Cited By ~ 1

Author(s):

Yangwoo Seo ◽

Kyeshin Lee ◽

Younho Lee ◽

Jeyong Kim

Keyword(s):

Reliability Prediction ◽

Failure Data ◽

Field Failure

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CP-K 570Y780T

Alloy Digest ◽

10.31399/asm.ad.sa0848 ◽

2019 ◽

Vol 68 (6) ◽

Keyword(s):

Tensile Properties ◽

Heat Treating ◽

Side Impact ◽

Complex Phase ◽

Automotive Components ◽

Weight Saving ◽

Very High

Abstract CP-K 570Y780T is one of a family of complex-phase steels, CP-W and CP-K, that offer very high strengths and yield points. They are particularly suitable for weight-saving production of cold-formed, crash-relevant automotive components such as side impact intrusion beams, B-pillar reinforcements,profiles, cross members, body reinforcements, bumper bars, and chassis parts. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on heat treating. Filing Code: SA-848. Producer or source: ThyssenKrupp Steel Europe AG.

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A Latent Issue of Via Resistance: Mechanism and Solution

10.31399/asm.cp.istfa2018p0121 ◽

2018 ◽

Author(s):

Wentao Qin ◽

Scott Donaldson ◽

Dan Rogers ◽

Lahcen Boukhanfra ◽

Julien Thiefain ◽

...

Keyword(s):

Thermal Stress ◽

Chemical Mechanical Planarization ◽

Resistance Mechanism ◽

Formation Enthalpy ◽

Metal Line ◽

Device Failure ◽

Valence Electrons ◽

Wafer Processing ◽

Field Failure ◽

And Tungsten

Abstract Many semiconductor products are manufactured with mature technologies involving the uses of aluminum (Al) lines and tungsten (W) vias. High resistances of the vias were sometimes observed only after electrical or thermal stress. A layer of Ti oxide was found on such a via. In the wafer processing, the post W chemical mechanical planarization (WCMP) cleaning left residual W oxide on the W plugs. Ti from the overlaying metal line spontaneously reduced the W oxide, through which Ti oxide formed. Compared with W oxide, the Ti oxide has a larger formation enthalpy, and the valence electrons of Ti are more tightly bound to the O ion cores. As a result, the Ti oxide is more resistive than the W oxide. Consequently, the die functioned well in the first test in the fab, but the via resistance increased significantly after a thermal stress, which led to device failure in the second test. The NH4OH concentration was therefore increased to more effectively remove residual W oxide, which solved the problem. The thermal stress had prevented the latent issue from becoming a more costly field failure.

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ANALISIS PERHITUNGAN HARGA POKOK PRODUKSI DAN PENENTUAN HARGA JUAL ATAS PRODUK (Studi Kasus Pada PT Dasa Windu Agung)

Jurnal Riset Manajemen dan Bisnis (JRMB) Fakultas Ekonomi UNIAT ◽

10.36226/jrmb.v1i2.23 ◽

2016 ◽

Vol 1 (2) ◽

pp. 183-190

Author(s):

Dwi Urip Wardoyo

Keyword(s):

Manufacturing Industry ◽

Sampling Method ◽

Manufacturing Companies ◽

Test Analysis ◽

Automotive Components ◽

Convenience Sampling ◽

Cost Of Production ◽

The Cost ◽

Keywords Cost

This study aims to determine the determination of the cost of production for products produced by PT. DWA. The Company is engaged in the manufacturing industry specialized in automotive components. Its activity is carried out through a series of production processes, so that expenses spent in the production will be calculated into the cost of the production sold. The population in this study were all manufacturing companies in Jakarta. Convenience sampling method selected one of the companies that get the confidence to assemble three national car project in Indonesia, namely Timor, Bakrie and Maleo. Test analysis used in this study is to test the calculation of full costing with job order costing. This study shows that (a) determination of the cost elements associated with the cost of production and (b) determining the cost of production on a product-based job costing with full costing approach. Keywords: cost of production, full costing

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Investigation of the Pressure Dependent Hydrogen Solubility in a Martensitic Stainless Steel Using a Thermal Agile Tubular Autoclave and Thermal Desorption Spectroscopy

Metals ◽

10.3390/met11020231 ◽

2021 ◽

Vol 11 (2) ◽

pp. 231

Author(s):

Patrick Fayek ◽

Sebastian Esser ◽

Vanessa Quiroz ◽

Chong Dae Kim

Keyword(s):

Stainless Steel ◽

Thermal Desorption ◽

Hydrogen Diffusion ◽

Martensitic Stainless Steel ◽

Thermal Desorption Spectroscopy ◽

Hydrogen Uptake ◽

Hydrogen Solubility ◽

Automotive Components ◽

Set Up ◽

Service Application

Hydrogen is nowadays in focus as an energy carrier that is locally emission free. Especially in combination with fuel-cells, hydrogen offers the possibility of a CO2 neutral mobility, provided that the hydrogen is produced with renewable energy. Structural parts of automotive components are often made of steel, but unfortunately they may show degradation of the mechanical properties when in contact with hydrogen. Under certain service conditions, hydrogen uptake into the applied material can occur. To ensure a safe operation of automotive components, it is therefore necessary to investigate the time, temperature and pressure dependent hydrogen uptake of certain steels, e.g., to deduct suitable testing concepts that also consider a long term service application. To investigate the material dependent hydrogen uptake, a tubular autoclave was set-up. The underlying paper describes the set-up of this autoclave that can be pressurised up to 20 MPa at room temperature and can be heated up to a temperature of 250 °C, due to an externally applied heating sleeve. The second focus of the paper is the investigation of the pressure dependent hydrogen solubility of the martensitic stainless steel 1.4418. The autoclave offers a very fast insertion and exertion of samples and therefore has significant advantages compared to commonly larger autoclaves. Results of hydrogen charging experiments are presented, that were conducted on the Nickel-martensitic stainless steel 1.4418. Cylindrical samples 3 mm in diameter and 10 mm in length were hydrogen charged within the autoclave and subsequently measured using thermal desorption spectroscopy (TDS). The results show how hydrogen sorption curves can be effectively collected to investigate its dependence on time, temperature and hydrogen pressure, thus enabling, e.g., the deduction of hydrogen diffusion coefficients and hydrogen pre-charging concepts for material testing.

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Failure behaviour of cladding made from Sv 07Kh25N13 austenitic stainless steel

International Journal of Pressure Vessels and Piping ◽

10.1016/j.ijpvp.2020.104275 ◽

2021 ◽

Vol 189 ◽

pp. 104275

Author(s):

J. Štefan ◽

J. Siegl ◽

J. Adámek ◽

R. Kopřiva ◽

M. Kytka

Keyword(s):

Stainless Steel ◽

Austenitic Stainless Steel ◽

Failure Behaviour

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Influence of Deep Rolling and Induction Hardening on Microstructure Evolution of Crankshaft Sections made from 38MnSiVS5 and 42CrMo4

HTM Journal of Heat Treatment and Materials ◽

10.1515/htm-2021-0002 ◽

2021 ◽

Vol 76 (3) ◽

pp. 175-194

Author(s):

A. Fischer ◽

B. Scholtes ◽

T. Niendorf

Keyword(s):

Process Parameters ◽

Microstructure Evolution ◽

Surface Hardening ◽

Qualitative Evaluation ◽

Induction Hardening ◽

Deep Rolling ◽

Automotive Components ◽

Hardening Treatment ◽

Steel Grades ◽

Definition Of

Abstract In order to improve properties of complex automotive components, such as crankshafts, in an application-oriented way, several surface hardening treatments can be applied. Concerning the material performance the definition of adequate process parameters influences the resulting surface properties and, thus, the effectiveness of surface hardening treatments. To analyze most relevant process-microstructure-property relationships, the present paper reports results obtained by two different well-established surface hardening procedures, i. e. deep rolling as a mechanical treatment and induction hardening as a thermal treatment. For each hardening process widely used crankshaft steel grades, i. e. a medium carbon 38MnSiVS5 microalloyed steel and a quenched and tempered 42CrMo4 were selected and thoroughly characterized upon processing, using equal parameter settings. The results reveal that deep rolling in contrast to induction hardening proves to be a less sensitive surface layer treatment with regard to small differences in the initial microstructure, the chemical composition and the applied process parameters. Differences in microstructure evolution with respect to the applied surface hardening treatment are studied and discussed for the highly stressed fillet region of automotive crankshaft sections for all conditions. In this context, high-resolution SEM-based techniques such as EBSD and ECCI are proven to be very effective for fast qualitative evaluation of induced microstructural changes.

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