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Is this your design?

Discovery is dangerous….but so is life. A man unwilling to take risks is doomed never to learn, never to grow, never to live - Pardot Kynes. Is this your design?. What is the material?. Looks like a materials problem. Steel = iron + carbon. Steel?. Some kind of steel?.

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Is this your design?

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  1. Discovery is dangerous….but so is life. A man unwilling to take risks is doomed never to learn, never to grow, never to live - Pardot Kynes

  2. Is this your design?

  3. What is the material? Looks like a materials problem Steel = iron + carbon Steel? Some kind of steel? What kind of steel? Does it matter?

  4. Types of steels 1005 1006 1008 1009 1010 1012 1015 1016 1017 1018 1019 1020 1021 1022 1023 1025 1026 1030 1034 1035 1038 1039 1040 1044 1044 1045 1046 1050 1060 1064 1065 1070 1074 1080 1090 1095 1108 1116 1117 1118 1119 1132 1137 1141 1144 1211 1212 1213 1215 1547 1548 3140 4012 1330 1335 1340 1345 4023 4027 4028 4032 4037 4042 4047 4118 4130 4140 4142 4145 4147 4150 4161 4419 4320 4340 4422 4427 4615 4620 4626 4718 4720 4815 4817 4820 5046 5060 5120 5130 5132 . . . .

  5. wt % carbon x 100 alloy element contents • Types of steels 1005 1006 1008 1009 1010 1012 1015 1016 1017 1018 1019 1020 1021 1022 1023 1025 1026 1030 1034 1035 1038 1039 1040 1044 1044 1045 1046 1050 1060 1064 1065 1070 1074 1080 1090 1095 1108 1116 1117 1118 1119 1132 1137 1141 1144 1211 1212 1213 1215 1547 1548 3140 4012 1330 1335 1340 1345 4023 4027 4028 4032 4037 4042 4047 4118 4130 4140 4142 4145 4147 4150 4161 4419 4320 4340 4422 4427 4615 4620 4626 4718 4720 4815 4817 4820 5046 5060 5120 5130 5132 AISI-SAE numbering system for steels XX XX

  6. wt % carbon x 100 alloy element contents • Types of steels 1005 1006 1008 1009 1010 1012 1015 1016 1017 1018 1019 1020 1021 1022 1023 1025 1026 1030 1034 1035 1038 1039 1040 1044 1044 1045 1046 1050 1060 1064 1065 1070 1074 1080 1090 1095 1108 1116 1117 1118 1119 1132 1137 1141 1144 1211 1212 1213 1215 1547 1548 3140 4012 1330 1335 1340 1345 4023 4027 4028 4032 4037 4042 4047 4118 4130 4140 4142 4145 4147 4150 4161 4419 4320 4340 4422 4427 4615 4620 4626 4718 4720 4815 4817 4820 5046 5060 5120 5130 5132 AISI-SAE numbering system for steels XX XX

  7. Type Tensile strength 1020 64.0 ksi 1030 75.5 ksi 1040 85.5 ksi 1050 108.5 ksi 1060 112.5 ksi 1080 146.5 ksi So, does it matter? Consider the properties of some steels - all hot-rolled & normalized

  8. Type Tensile strength 1020 64.0 ksi 1030 75.5 ksi 1040 85.5 ksi 1050 108.5 ksi 1060 112.5 ksi 1080 146.5 ksi So, does it matter? Consider the properties of some steels - all hot-rolled & normalized

  9. Steel Tensile strength 1040 hot rolled and normalized 86 ksi 1040 quenched and tempered at 400 F 130 ksi 8640 quenched and tempered at 400 F 270 ksi (8640: Fe - 0.5%Cr - 0.5%Ni - 0.2%Mo - 0.4%C) Apparently, changing carbon content changes mech props significantly Is changing carbon content only way to change mech props?

  10. heat treatment mechanical work Steel Tensile strength 1040 hot rolled and normalized 86 ksi 1040 quenched and tempered at 400 F 130 ksi 8640 quenched and tempered at 400 F 270 ksi (8640: Fe - 0.5%Cr - 0.5%Ni - 0.2%Mo - 0.4%C) add alloying elements Apparently, changing carbon content changes mech props significantly

  11. change “structure” Changing structure changes properties What do these things do in steels? change C content mechanical work heat treat alloying elements

  12. What about Al alloys? Lotus Elise 190 hp 1984 lbs 0-60 mph - 4.9 sec top speed - 150 mph 27 mpg hiway $46K

  13. Lotus versatile vehicle architecture system (VVA) Almost completely "aluminum" - high pressure die-castings, stampings, and extrusions Advanced Materials & Processes, July 2005, p 29 Al???

  14. OK…..which "aluminum" is it? 1050 1145 2014 2024 2219 2618 3003 3004 3105 4032 4043 5005 5052 5083 5154 5182 5262 5652 6010 6061 6262 6463 7005 7050 7072 7075 7175 7178 7475 7229 . . .

  15. Does NOT contain 0.61% carbon OK…..which "aluminum" is it? 1050 1145 2014 2024 2219 2618 3003 3004 3105 4032 4043 5005 5052 5083 5154 5182 5262 5652 6010 6061 6262 6463 7005 7050 7072 7075 7175 7178 7475 7229 Alloy designation NOT same as steels In fact, no carbon at all in ordinary Al alloys

  16. 1050 1145 2014 2024 2219 2618 3003 3004 3105 4032 4043 5005 5052 5083 5154 5182 5262 5652 6010 6061 6262 6463 7005 7050 7072 7075 7175 7178 7475 7229

  17. Number Major alloy addition 1xxx - 2xxx Cu 3xxx Mn 4xxx Si 5xxx Mg 6xxx Mg & Si 7xxx Zn 8xxx other Here’s the scoop -

  18. Yield strength Tensile strength Low-strength 30 ksi 60 ksi steel Pure aluminum 5 ksi 13 ksi Al alloy 2024-T4 47 ksi 68 ksi So, does alloying affect the properties? Al alloy containing 4.4% Cu (say 2024) can be heat treated to strength level much higher than that of pure Al

  19. So, does alloying affect the properties? Al alloy containing 4.4% Cu (say 2024) can be heat treated to strength level much higher than that of pure Al Yield strength Tensile strength Low-strength 30 ksi 60 ksi steel Pure aluminum 5 ksi 13 ksi Al alloy 2024-T4 47 ksi 68 ksi What’s this??

  20. T4 designates a heat treatment (Al alloys only) "solution heat-treated, quenched, and naturally aged to a substantially stable condition"

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