Metallurgy/Questions
| Subject | Date Asked | Expert |
| 4032 aluminum | 1/29/2012 | RAJINDER PRASAD SHARMA |
| Q: Morn, I am building a steam engine and need to modify the piston. The center of the piston where the ... A: Are you from a piston manufacturing unit or struck up to redesign only one piston available with ... | ||
| project work | 1/7/2012 | RAJINDER PRASAD SHARMA |
| Q: sir I am studying 1st year metallurgical engineering in Andhra University....can u suggest me about ... A: you can display a prototype project of Gravity Die Csting unit with clearly defined process flow ... | ||
| K alloy aluminum | 1/4/2012 | RAJINDER PRASAD SHARMA |
| Q: Will multiple remeltings of k alloy aluminum cause the copper content to be elevated. I seem to be ... A: Copper having been its melting point very high compared to aluminium, each remelting will increase ... | ||
| Iron strips in an aluminium sheet | 12/10/2011 | RAJINDER PRASAD SHARMA |
| Q: I am not sure if my question falls within your area but it does relate to the forming of aluminium ... A: The section shown in image is quite thick, may be a casting. If so, yes you can encapsulate iron in ... | ||
| best colledge to study metallurgy | 11/16/2011 | RAJINDER PRASAD SHARMA |
| Q: iam agirl whos currently doing matric iwould like to study mettallurgy but my marks aint allow me to ... A: Happy to note your interest in metallurgy.Girls are very successful in metallurgical analysis and ... | ||
| weld problem with ss | 10/7/2011 | RAJINDER PRASAD SHARMA |
| Q: sir we use 304 grade stainless steel. It's used in a water heating equipment and their are leak in ... A: I need the following informations to anaswer your1) Composition of weld electrode. 2)Adequacy of ... | ||
| Packing fraction | 9/9/2011 | Javad Mola |
| Q: What is the packing factor of structure BCT? A: In an extreme case where the tetragonality factor of the BCT crystal structure is zero, it can be ... | ||
| Cast iron | 8/25/2011 | Charles Smith |
| Q: Why the cast irons welding is not feasible? ANSWER: Sorry it has taken me so long to get back. I ... A: Like I stated before, it can be welded. You need to get a cast iron welding rod nickel cadmium ... | ||
| Mg treatment | 8/19/2011 | RAJINDER PRASAD SHARMA |
| Q: sir. I want to know about the 'mg treatment' of cast irons. How the graphite flakes in cast iron are ... A: In cast iron matrix,we normally find free graphite flakes,pearlite,cementite,martensite,ferrite ... | ||
| Expansion of Gray cast iron | 8/18/2011 | RAJINDER PRASAD SHARMA |
| Q: Why the gray cast irons are expand while they solidify from liquid condition? Instead of shrink ? ... A: There is difference in crystallographic structure of graphite(Hexagonal) and alpha iron(B.C.C).When ... | ||
| Morphology of martensite | 8/14/2011 | RAJINDER PRASAD SHARMA |
| Q: Sir! Can you tell me the morphology of martensite while seeing through metallurgical microscope? A: Hello!Before I answer your quarry,lets understand martensite. Martensite can be best understood as ... | ||
| austenite steels | 8/11/2011 | RAJINDER PRASAD SHARMA |
| Q: what makes austenite steels stable at room temperature A: 11-08-2011 Austenite is iron allotropic phase called Gamma-iron has F.C.C crystal lattice, is soft ... | ||
| 17-4 PH Y.S FAILURE | 6/8/2011 | Javad Mola |
| Q: WHAT IS THE REASON FOR THE FAILURE OF Y.S of 17-4 Ph THOUGH OTHER MECH PROPS MEETING THE REQMT..? A: First you need to make sure that the composition is right. If yes, then it could be due to the ... | ||
| Loss of strength on EN AW 6082-T6 wheel forging ? | 4/20/2011 | Charles Smith |
| Q: Would powdercoating my OZ brand forged EN AW 6082-T6 motorcycle wheels at aprox. 400 F ... A: I dont think so. But I dont want to say yes and then end up finding out that you get in an accident ... | ||
| Differentiating 304 grade stainless steel from 201 grade | 2/28/2011 | Javad Mola |
| Q: I am a layman [non engineer]. I am having 700 banquet chairs manufactured in China, the frame being ... A: The magnet method will not help and I do not know any other simple and cheap method to differentiate ... | ||
| metal growth | 2/25/2011 | Charles Smith |
| Q: We froze a piece of hardened a-2 rockwell 57 in liqid nitrogen. after we tried unsuccessfully to ... A: Ya I figured that out after I asked you. I am not very sure on this but when you super cooled it ... | ||
| separate gold from aluminum | 2/12/2011 | Charles Smith |
| Q: I have a car alternator housing that has been covered with gold inside and out.and it look very ... A: So it sounds to me that you are wanting to keep the gold, right? Can you see the aluminum or just ... | ||
| strain hardening | 2/2/2011 | Javad Mola |
| Q: sir, my straight question is Why dislocation density increases with increase of strain. A: When metals are strained, dislocations are generated and glide on certain specific crystallographic ... | ||
| work hardening/slip planes | 12/18/2010 | Javad Mola |
| Q: does pure gold have slip planes? A: Slip is a main work hardening mechanism in most metals including pure gold. Because gold has a Face ... | ||
| 17-4 PH ss rehardening | 11/23/2010 | Javad Mola |
| Q: I have a flat plate of 17-4 that has been taken to the H900 condition. Can it be annealed back so ... A: Martensitic precipitation hardenable stainless steels have an austenitic matrix in the solution ... | ||
| Custom 465 Stainless | 11/22/2010 | Javad Mola |
| Q: what effect will have on a bar(.135 Diameter x .930 long)of 17-4 Material heat treated at 900F for 4 ... A: Martensitic precipitation hardenable stainless steels have an austenitic matrix in the solution ... | ||
| 17-4 heat treat | 11/15/2010 | Javad Mola |
| Q: what effect will have on a bar(.135 Diameter x .930 long)of 17-4 Material heat treated at 900F for 4 ... A: Heat treatment of 17-4PH at 900 F (~480 degree Celsius) for 1 hr leads to the peak strength and ... | ||
| STAINLESS STEEL THAT PASS NEEDLE DETECTOR | 8/31/2010 | Javad Mola |
| Q: Does any one know a kind of stainless steel that can pass a needle detector (Machine that is used in ... A: The grades you have mentioned all have a nominally austenitic microstructure and are non-magnetic as ... | ||
| Metallurgy In College | 6/25/2010 | John Roe |
| Q: I am have a question regarding Metallurgy on a College level. I want to make a career of welding and ... A: Really the two year college route won't eliminate any of the engineering classes you'll have to take ... | ||
| Copper in steel heats | 6/24/2010 | John Roe |
| Q: What is the formula for determining how many lbs of copper will raise the copper content of a 165 nt ... A: Copper does not oxidize in steelmaking, meaning what you have is there to stay. To calculate this ... | ||
| casting forging | 6/5/2010 | John Roe |
| Q: I have question as follows Which process can give lower cost, casting or forging or sheet metal ... A: Overall, forging is typically more expensive than casting in the long run. Here's a decent link to ... | ||
| Reporitng of NITROGEN in Test Certs | 6/5/2010 | Javad Mola |
| Q: Is it mandatory to report Nitrogen content in the Test Certificates provided for Chemical ... A: The ASTM A479 standard does not indicate the nitrogen content of the 316L austenitic stainless steel ... | ||
| Stretcher Strain | 6/1/2010 | Javad Mola |
| Q: What is "Stretcher Strain" ? Is it the band son the surface of a sheet like "luders bands" ? Does it ... A: Stretcher strains are consequences of the yield point phenomenon. The yield point phenomenon is ... | ||
| Stainless steel vs. Carbon steel | 5/27/2010 | Javad Mola |
| Q: I own a manufacturing company that manufactures components for the overhead conveyor industry. Our ... A: There are certain grades of martensitic and precipitation hardenable stainless steels which can ... | ||
| Temper Rolling ,Skin-pass, is to prevent? | 4/26/2010 | Javad Mola |
| Q: "Temperrolling" or "Skin-pass" is process done to prevent wavy surface , improve surface quality , ... A: Skin pass helps prevent formation of Luders bands during the sheet forming operations of steels by ... | ||
| stainless steel | 4/20/2010 | Javad Mola |
| Q: sir I want to know that why during cold working austenitic stainless steel become magnetized? A: It is because the austenite in these steels is metastable, not stable. Therefore, application of ... | ||
| physical matellurgy | 3/25/2010 | Javad Mola |
| Q: why do the fcc crystal structure of iron absorb more carbon than bcc crystal structure of iron A: It is simply related to the fact that the size of the interstitial lattice sites are larger in the ... | ||
| metallurgy | 2/23/2010 | Javad Mola |
| Q: HOW TO CALCULATION OR DESIGN AC3 AND ACM TEMPERATURE ? A: If you are talking about the Fe-C binary system, without any other alloying elements, the answer is ... | ||
| H900 HT 17-4ph | 2/3/2010 | Javad Mola |
| Q: What would be the normal UTS range for this material and HT spec. If a component has been HT to ... A: The minimum UTS after H900 age hardening treatment of 17-4PH stainless steel is 190 ksi (1310 MPa) ... | ||
| METALLURGY | 1/19/2010 | P.G.Panikkar |
| Q: Pls suggest some university offering Ph.D in Materials Science in india, it is possible to do Ph.D ... A: I request you to kindly go to google search and find out the answer yourself . I do not know why ... | ||
| Rockwell Hardness | 1/14/2010 | Javad Mola |
| Q: Why in this testing method we apply 2 forces? Thanks of your answer . A: First of all sorry for the late response; I failed to read the original email containing your ... | ||
| Rockwell Hardness | 1/14/2010 | P.G.Panikkar |
| Q: Why in this testing method we apply 2 forces? Thanks of your answer . A: I am not an expert in Physical metallurgy and Mechanical testing and my expertise is limited to ... | ||
| metallurgy | 1/9/2010 | P.G.Panikkar |
| Q: What is meant by metallurgy? A: Please read that 1. Metallurgy is "the art of working Metals esp, of extracting metals from their ... | ||
| Iron sintering | 1/6/2010 | P.G.Panikkar |
| Q: Is it possible to sinter iron particles of 0.2mm? ANSWER: If you are speaking about iron ore of ... A: Let me write in brief about sintering though I am unable to show pictures here. In travelling ... | ||
| Iron sintering | 1/5/2010 | P.G.Panikkar |
| Q: Is it possible to sinter iron particles of 0.2mm? A: If you are speaking about iron ore of 0.2mm , it can be mixed with iron ores of higher size and ... | ||
Javad Mola
Top Expert on this page
Expertise
I welcome questions related to the physical metallurgy of steels, preferably stainless steels.
Experience
As a PhD student of the Graduate Institute of Ferrous Technology (GIFT), I am working on a ferritic grade of stainless steel.
Organizations
Graduate Institute of Ferrous Technology affiliated to Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea. Pohang is home to POSCO, the third largest steel company in the world.
Publications
Solid State Phenomena (3), Steel Research International (1), Materials Science and Technology (1), Metallurgical and Materials Transactions A (2), Scripta Materialia (1)
Education/Credentials
BS degree in Materials Engineering earned from Isfahan University of Technology, Isfahan, Iran. MS degree in Materials Science and Engineering earned from Sharif University of Technology, Tehran, Iran. Currently PhD candidate at Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
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