December 31, 2009

Slowly but surely strive toward the goal

Animal Warning Signs

Although  long not  to post about metallurgy (due to limited knowledge T.T) but try always to achieve the goal ^ ^ to write about metallurgy. Struggle requires sacrifice and a long time. Please be patient readers ^ ^.

God willing, As soon as posible i'll publish the next article about metallurgy.

December 22, 2009

Metals Class

بِسمٍ الله الرَحْمنِ اللرَحِيْم

Materials in this group are composed of one or more metallic elements (such as iron, aluminum, copper, titanium, gold, and nickel), and often also nonmetallic elements (for example, carbon, nitrogen, and oxygen) in relatively small amounts[1] that made one compound in nature.

Metals account for about two thirds of all the elements and about 24% of the mass of the planet. Metals have useful properties including strength, ductility(i.e., capable of large amounts of deformation without fracture), high melting points, thermal and electrical conductivity, stiffness and toughness which accounts for their widespread use in structural applications. From the periodic table, it can be seen that a large number of the elements are classified as being a metal. A few of the common metals and their typical uses are presented below.

Common Metallic Materials
  • Iron/Steel - Steel alloys are used for strength critical applications
  • Aluminum - Aluminum and its alloys are used because they are easy to form, readily available, inexpensive, and recyclable.
  • Copper - Copper and copper alloys have a number of properties that make them useful, including high electrical and thermal conductivity, high ductility, and good corrosion resistance.
  • Titanium - Titanium alloys are used for strength in higher temperature (~1000° F) application, when component weight is a concern, or when good corrosion resistance is required
  • Nickel - Nickel alloys are used for still higher temperatures (~1500-2000° F) applications or when good corrosion resistance is required.
  • Refractory materials are used for the highest temperature (> 2000° F) applications.

Metal have a good properties in their use because of their atomic structure. Atoms in metals and their alloys are arranged in a very orderly manner, and in comparison to the ceramics and polymers, are relatively dense.

The key feature that distinguishes metals from non-metals is their bonding. Metallic materials have free electrons that are free to move easily from one atom to the next (electrons are not bound to particular atoms). The existence of these free electrons has a number of profound consequences for the properties of metallic materials. For example, metallic materials tend to be good electrical conductors because the free electrons can move around within the metal so freely.

Furthermore, the structure of metals the types and applications of metals and their alloys are discussed in next post. Insya Allah.

  1. The term metal alloy is used in reference to a metallic substance that is composed of two or more elements.

Classification of Materials

In this section we will discuss about the classification of materials. Before entering into the subject I wanted to ask the readers? what the definition of material? and what do you know about the material? this is very important for the answer before sharing materials.

Okay, because our discussion of metallurgy and materials engineering is only natural that we define what we mean material are :
  • Materials are everywhere around us – make up our world--
  • The substance or substances out of which a thing is or can be made [1]
  • Things needed for doing or making something [2]
For those who want to add definition of material please comment below and please include the source or the reference

Now go into the main subject discussion, at the classified material by the following experts in view of the nature (properties). Material divided in six separated major classes of materials: metals, polymers, ceramic, composite, semiconductor, alloy. All of them have different characteristics. Table below can help show the difference that the six classes of material:

Solid materials have been conveniently grouped into three basic classifications based primarily on chemical makeup and the atomic bonding forces of a particular material, and most materials fall into one distinct grouping or another, although there are some intermediates.

These three classifications are metallic, ceramic and polymeric.

In addition, there are the composites, combination
of two or more of the above three basic material classes. Another classification is advanced materials—those used in high-technology applications— . semiconductors, biomaterials, smart materials, and nanoengineered materials.

Within each of these classifications, materials are often further organized into groups based on their chemical composition or certain physical or mechanical properties. But we will not discuss it now.

Below is a list of some of the commonly classification of materials within these four general groups of materials.

  • Ferrous metals and alloys (irons, carbon steels, alloy steels, stainless steels, tool and die steels)
  • Nonferrous metals and alloys (aluminum, copper, magnesium, nickel, titanium, precious metals, refractory metals, superalloys)
  • Thermoplastics plastics

  • Thermoset plastics

  • Elastomers
  • Glasses
  • Glass ceramics
  • Graphite
  • Diamond
  • Reinforced plastics
  • Metal-matrix composites
  • Ceramic-matrix composites
  • Sandwich structures
  • Concrete

Insya Allah, next post we will discuss the outline of each class of material on top.


December 14, 2009

The Scope of Metallurgy and Materials Engineering

On the previous post we discussed what it was metallurgy and materials engineering. Now we will discuss the scope of metallurgy and materials engineering.

The scope of Metallurgy and Materials Engineering:

As shown in the diagram, on the Microstructure, one must understand the different metallurgical properties owned material, starting from atoms, molecules, electrons, crystals.

In the processing, metallurgy must understand how to process the ore or raw material into something that the desired material.

In the fabrication, metallurgist is expected to process more material that there became something components, tools and various other applications, in this section, the expertise of the materials are in need, because if the wrong material or wrong to make will lead to accidents or damage while in wear, even when the fabrication.

The last one, in part to protect the agent of destruction, it is normal if the material has aged wear, especially if the use was in conditions that are less supportive, one of which is corrosion, it will further shorten the life of a material age. Here matelurgi role to engineer the material to increase expiry date and not easily degraded.

Remember, this is only prolong the life of wear, can not be forever preserved. Expertise required for that material merecycle expiry date is over or has been degraded.

That's all I can write here, please amended if there is an error: just give your comment below or email me : Dr.Logam @

Archieve Download

Because of the limitations of the download link in the home page, I took the initiative to load the file download link at this page. While the download link on the front page only for some materials that may be related to my last post or is becoming hot news at the time.
I save these files in file hosting, so as to download or view these files depends on each of these hosting providers. I hope that visitors are not disturbed convenience when downloading or reading the preview of the file.
Physisc 1(Heat-Mechanics):
because there is a problem with the file hosting providers so it can not preview file viewed directly, but please be downloaded when needed. Hopefully useful
2.Perubahan Fasa dan PanasLaten.ppt
2Thermal Expansion of Solids and Liquids.ppt
3.Heat and the First Law.ppt
4.Work and Heat in Thermodynamic Processes.ppt
5.The Kinetic Theory of Gases.ppt
6.Molar Specific Heat of an Ideal Gas.ppt
7.Latihan soal Fisika Panas Dep Metalurgi.ppt
9.The Carnot Engine.ppt
Latihan Soal UTS Panas.pdf
Latihan Soal UAS

Mechanics(Fisika Mekanika)

Mekanika1 -

Physisc 2:(Magnet-Electricity)
Alhamdulilah, this time a preview of the file can be viewed, even directly read with fullscreen, so for those who just want to read does not need to download it.Hopefully useful.
The others files that have linked below, just click->>other doc by this user<-- to get another file.

1._LisMag_-_Muatan_Listrik_dan_Medan_Listrik -

UTS Gelombang.pdf
UTS MAgnet.pdf


Engineering Mechanics -Statics- and Mechanics :

BAB 1 -
Solution Manual for Hibbler

About Me

My Real Name is Widia Kurnia Adi, I was born in Sragen in 1990. My pen name widi kurn, but I use Dr.Logam name in this blog , hoping to become an expert in the field of metallurgy and materials. Alhamdulilah I'm now given the opportunity to study at the Faculty of Engineering, University of Indonesia.

Really I was surprised to find out what widia means, which in the minds of most people is the name of a girl, but it was not. The following are some of the meaning of the name widia:
  • Widia (of Wi'e Dia'mant) is a registered label name of the company Krupp for tungsten carbide, a sinter material.  
My surprise is the mean widia as metal, which materials that have high hardness properties, so use as a  precision-engineered metalcutting  .I hope I can become as hard as "widia", an unbeatable material by wear and unbeatable by other metals. With a violent effort and determination that I have hopefully become a useful expert. Amien


Hi,I'm Dr.Logam. Thank you for visiting my blog. If you have a product or ad you want to advertise on my blog, please contact me at Dr.Logam @ or call me on 02133690451

For the cost of installation can be customized to customer demand.


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    • To anyone who wants to share various things about metallurgy and materials do not hesitate to send an email to Dr.Logam @
    • Hopefully we can learn more about materials.
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    December 13, 2009

    What Is Metallurgy and Materials Engineering?

    Metallurgy and Materials Engineering is the discipline which studies the production, processing, characterization, selection, and design materials. Metallurgist's obligations is to design new materials, develop and modify the manufacturing process of materials, material selection, failure analysis due to the use of materials, and characterization of the structure and properties of materials.

    Outlines the scope of metallurgy and materials engineering can be described in the chart below

    For more details about the diagram above, Insha Allah, will be written in the next posting