Multi‐Criteria Material Selection in Engineering Design

Abstract

with Mg? And can alloying be used to produce such insoluble compounds.Imperative Defensive Research: The corrosion mechanism indicates that stress corrosion cracking (SCC) is a concern. Moreover, there is the expectation that environment assisted cracking (EAC) (including SCC and hydrogen embrittlement (HE)) failures will increase with increased use of Mg alloys in load bearing applications. The low incidence of service SCC failures can be attributable to low actual stresses in service in the past. However, the incidence of EAC is expected to increase because the service conditions for Mg alloys are changing, particularly in the automobile industry where magnesium components are being increasingly used in structural load-bearing applications. Furthermore, increased loading on these magnesium components is a natural progression as designers increase the loads and decrease the section sizes of components as part of the environment imperative to decrease weight. Moreover, the magnesium components in the load bearing applications are increasing in complexity, and this increasing complexity increases the probability of high loads in some parts of such components. It is imperative that research is undertaken to provide understanding of this issue before there are some service incidents. It is important to understand (1) environmental influences and (2) alloys influence.The study of the localised corrosion of the current alloys is needed for a deeper understanding of their corrosion behavior. It is known that localised corrosion is the most common form of corrosion for magnesium alloys, but so far there have been no mechanistic studies of this form of corrosion for magnesium alloys. In addition, it necessary to understand the corrosion performance of existing (and new) alloys so that it is possible to make engineering decisions about their service performance.

AHP-Based Evaluation Model for Optimal Selection Process of Patching Materials for Concrete Repair: Focused on Quantitative Requirements

“…The MCDM methods in this category are credited for their simplicity. Examples of these methods include: (Chawalwala 1999;Chen et al 1994;Liao 1996;Ashby 2005;Saaty and Vargas 1987;Bamkin and Piearcey 1990;Fitch and Cooper 2004;Steeves and Fleck 2004;Ishii 1996;Rao 2008;Rao and Davim 2008;Jalham 2006;McDonald et al 2000;Shanian and Savadogo 2006;Rao 2006;Jee and Kang 2000;Sirisalee et al 2004;Zhou et al 2009;Vokurka et al 1996 …”

“…A slight decline in one attribute is acceptable if it is compensated by some enhancement in one or more other attributes. Compensatory methods can be classified into the following four subgroups (Chawalwala 1999;Chen et al 1994;Al-Zahrani et al 2003;Liao 1996;Ashby 2000Ashby , 2005Smith and Hashemi 2006;Saaty and Vargas 1987;Bamkin and Piearcey 1990;Sapuan 2001;Fitch and Cooper 2004;Steeves and Fleck 2004;Ishii 1996;Jalham 2006;McDonald et al 2000;Saaty 1994a, b;Shanian and Savadogo 2006;Jee and Kang 2000;Sirisalee et al 2004;Zhou et al 2009;Vokurka et al 1996;Stuart and Sommerville 1998;Holloway 1998). …”

“…No comparison is made between objects. Detailed explanations are made in references (Sapuan 2001;Saaty , 1980Shanian and Savadogo 2006;Sirisalee et al 2004;Vaidya and Kumar 2006;Vargas 1990).…”

Sustainable Material Selection of Toxic Chemicals in Design and Manufacturing From Human Health Impact Perspective

“…It should be noted that in this study the human health impact assessment of toxic chemicals is used as a decision support tool only for the final benchmarking of top ranked candidate chemicals which are selected from the conventional material selection process, as shown by the shaded process flows in figure 2 above, while the human health impact assessment can also be used in the initial material screening and ranking simultaneously with the conventional material selection process to support decision-making. For conventional material selections based on functionality and cost, a large number of research results and useful methodologies have been published [6][7][8][9][10]. …”

Perspective: Materials informatics across the product lifecycle: Selection, manufacturing, and certification

“…Formally, we want to identify the subset of materials that represent as close an approximation as is available to the Pareto front, 13,14 the surface over which any incremental improvement in one material property is attended by the commensurate reduction of another. Further selection from this set can be made by constructing a scalar-valued fitness function with penalties associated with each property tradeoff (e.g., a 10% reduction in yield strength may be worth a 5% increase in corrosion resistance), but the principle challenge is in sampling from Pareto optimal materials.…”