1.1.2 The "Why" Questions
|In this Hyperscript I will focus on "why questions". I need to take you to the very roots of Materials Science so you can understand the answers. We need to talk about atoms, why they stick together to form iron or steel in the structure of a crystal, and how defects in this crystal determine some of the important properties of iron. Things like the second law of thermodynamics, phase diagrams, precipitates and dislocations will come up.
| Some of you may not have encountered these fancy words before; some of you might
see them as synonymous for "boring" or "things I will never understand". Don't worry, be happy! I will
introduce those things patiently, slowly andpromise!
without math. You will understand to the extent you should, and I will do
my best not to make it boring.
So do not worry about fancy words coming up that you do not (yet) understand. What you should worry about is that you probably don't know the exact meaning of some everyday words like temperature or hardness.
|Funny enough, it appears that going to the very roots of those simple "why" questions has never been done before for a general, non-specialist readership.
Nobody thought it worthwhile to tell you in sufficient detail about swords, metals and steel. There are good reasons for
| I do acknowledge some valiant efforts to address the general matter by some
scientists. Take, for example, the books of Rolf Hummel or Steve Sass, two authors I know and esteem. However, they did not go deeply enough into the
matter I want to pursue here. This link gives some information about
some books I have read and that might benefit you too.
It also gives a few of the major Internet sources that I used and that are of interest for the whole Hyperscript.
|The science behind many everyday topics was never properly explained to a general
readership. But interestingly enough, a lot of effort has been made to educate you, the average reader, about far-out stuff
like black holes, time travel through worm
holes, exotic elementary particles like the naked bottom quark (one of my
daughters was quite stricken with it), string theories in 11 dimensions, or the big bang at the beginning of the universe.
Take "The Grand Design", the newest book of Stephen Hawking. It is actually frowned upon in the physics communityso why did Steven write it? I don't know but can think of several good reasons:
|I let you guess at my reasons for writing this book. Drink (lots of) your favored beverage while you guess, and you may get closer to the truth.
|The "what is " questions around iron, steel and swords have been discussed in many good books and publications for quite some time, in contrast to the "why " questions. A lot of more or less superficial answers have been supplied as well.
|The emphasize here is on "good". I most certainly don't want to imply that a book is automatically bad if it does not address the deepest layers of knowledge about its topic. Just before 1900, for example, Ludwig Beck wrote "Die Geschichte des Eisens" (The history of iron). The 5 ponderous volumes still provide for good reading (provided you're fluent in German) even so the author never answers any of the "why" questions from above. He wasn't stupid or lazy; he simply couldn'tthe answers weren't in around 1900.
|In the 1962 book of T. A. Wertime, entitled "The Coming of the Age of Steel", you will not find key words like "dislocations ", "precipitates" or "phase diagram". The importance of whatever those terms mean for really understanding steel (or just about any metal) was known by thenbut only by some scientists, and not yet by the engineers. Nevertheless, Wertime's book still provides for good reading.
|I could go on enumerating and discussing books and articles forever, but I won't. I have made my point. Also, to be honest, I haven't read most of the books about iron, steel and swords that are out there. Nobody has; there are simply too many. I will, however, refer to some of the literature that was relevant for me in footnotes.
|So please note that I'm not even remotely saying that books dealing on an empirical level with iron, steel and the art of sword making are worthless, outdated, unscientific or wrong, and that it's me, and only me, who gives you the good stuff. Quite the opposite. Some of the people who wrote these books actually might be able to make steel or to forge a swordin pronounced contrast to me. Many authors certainly know far more about some science issue than I do, for example about the thermodynamics or mechanics of steel. Then there are people who can wield a sword in a fight and thus are far better judges of the fighting quality of a sword than I am.
|On the other hand, many engineers and scientists involved in actually making steel probably know less about the basic principles behind steel properties than I do. The reason is simple. You don't need to know all the fundamental stuff for producing all kinds of steel and to make the most amazing things with steel. Scientific knowledge about iron, steel and just about all other materials emerged in the 19th century and was consolidated no earlier than around 1960. Yet more than 2000 year before that time some artisan-artists already made most amazing steel product: swords.
|Looking at steel before about 1960, one looked at the empirical
knowledge gained during the last 2000 years or so, plus some insights from classical physics disciplines like mechanics
and thermodynamics that emerged in the 17th century. Before (roughly) 1960 only a few theoretical Materials Science specialists
(who could not have forged a sword if their live depended on it) knew the fundamental answers to the "why" questions
raised above. These guys had some ideas about our topic because they actually discovered
the scientific principles that allow us to answers the "why" questions now.
Of course, you have never heard their names. You wouldn't even connect scientists whose names you have heard to steel and sword making. Galileo Galilei and steel? Albert Einstein and steel? Well, we shall see (provided you keep reading).
|Let me emphasize again that there are still scientists and engineers out there that work with steel but do not know much more about steel then what I'm going to tell you here. They simply don't need to know that for doing their jobs. Understanding iron and steel on the level I will pursue here is not yet going to help you very much in making thousands of tons of steel every day, fine objects like swords or sewing needles, or the landing gear of a Jumbo jet. For making a baby you don't need to know the working of nature on the deepest level either. It might even distract you from your enterprise if you think too much about what the DNA of your sperm (or egg; I'm certainly not writing this only for the males of the species) is going to do in the near future.
|Nevertheless, if you want to get the ultimate answers to the "why" questions, you must go to rock bottomand down there you find the atoms. All properties of steel derive from the way its atoms hang together.
|So nothing helps. You first need to know a bit about atomsthat
they really and truly exist, for exampleand some of the tricks involved in making solids by sticking a lot of atoms
together. If you don't know about the breakthroughs in science made in the first half of the 20th century, let's say Albert Einstein (here he is again!) proving once and forever the reality of atoms, you simply
cannot understand the answers to the "why" questions.
I grant you that it is more fun making a baby than understanding exactly how it comes into being. I don't want to keep you from making babies or just practising it, nor from forging your sword. But it won't hurt to read up a bit on the "theory" of whatever you are doing, whenever you take a break. It actually might be entertaining or just plain old fun. Try me.
|Considering that it takes a while before discoveries in basic physics trickle down to engineering (especially if a world war provides for some distraction), the year 1960 may be seen as a fuzzy starting point for the emergence of Materials Science, the science that investigates and understands properties of all materials (including steel) on the deepest possible level.
|You got it by now. Only by looking at the very atoms that constitute a piece of steel (and anything else) we will be empowered to understand the properties of steel (and everything else) on the deepest and most fundamental level. So what I'm going to do in this book is to look at the atoms. And if I say "look", I mean it.
|I will ask and answer the "why" and "how" questions that come up as soon as we look at steel from the viewpoint of the atoms in the steel. Going into the depth of this matter, far more "why" questions of a more general type will come up than you would have imagined in your wildest dreams. Why do things melt?, for example. I'm also going to address these deceptively simple questions in some detail.
|Dear reader, I assume that you are not overly familiar with quantum theory, statistical thermodynamics, chemistry, crystallography, metallography, electron microscopy, and all the other topics that are at the heart of "Materials Science and Technology", the discipline that deals with topics like steel forging or semiconductor technology. Taking you to the very roots of steel technology without cutting corners thus will not be a quick and easy undertaking.
|I strongly believe that it can be done, however, and what follows
is my first shot at this issue. If you will come with me I will take you on a long and (I hope) fascinating journey to the
very roots of our civilization. Because that's what Materials Science and Technology is! Without "technical" materials
like wood, fur, leather, flintstone, bronze, iron, and combinations like pianos, Mercedeses, microchips, (I skipped a few
development stages), there is no civilization.
I'll try to make it easy reading. But let's not fool ourselves: it will be an arduous journey with pitfalls and strenuous uphill walks.
|If you make it to the end, you will be wiser but also a bit exhausted. That is only natural. The rewards for your perseverance will include a much better appreciation of the beauty of swords and of the artistry that went onto their making. You will also have a better understanding and appreciation of all the many metal things that you use every day (I hope this doesn't include a sword), and of some other key materials like silicon. In short:
© H. Föll (Iron, Steel and Swords script)